Rick,
I've owned my D300 since it first came out. Chose it then because I could use all my legacy AI lenses from my film days. I have since acquired a D7200 as my other crop body, but still keep and use the D300. You might consider acquiring a used - in excellent condition - Nikkor 18-200mm VR lens also. It's a great alternative to multiple lens - works great on that body, and is smaller and lighter than it's bigger brother the 18-300. I've had no issues with my D300 and don't let the 12mp sensor size fool you - I have even made 20-24" prints with no issues.
Enjoy!
-Chuck.

This is the real issue associated with an upgrade to the new OS on MACs - Fotoartist hit the nail on the head. The newest OS for MACs only supports 64-bit applications. Windows is not far behind in taking this step. As hardware advances (8 core, 16 core, faster chips, etc...) 32-bit becomes obsolete. Much the same way early DSLRs are becoming. If you maintain older OSs, which many people do, then you won't have any problems running older applications. If you are satisfied with 12-mp cameras - which many people are and they take wonderful images with them, then you can stick with older OSs. But support for those older OSs also disappears just like support for older DSLRs disappears.

Also - Legacy standalone Adobe products - use yes, subscribe no

That is an excellent link with outstanding information.
Thank you.

Beautiful shots - especially the 2nd image.
I also still use my AI lens on my current DSLRs.

I wonder if it's a hold over from the ol' film days when many of Nikon's cameras (FE, FM, etc) came in your choice of black or silver? And as tallshooter noted, they currently offer some lines in red on occasion.

I picked up a Factory Refurbished Nikon 7200 through Adorama for under $650 and a shutter count of 12. They are now even less expensive through Adorama and B&H. I was upgrading from a D300 and also have an excellent collection of DX glass. I had weighed the 7500 vs the 7200 but for my photographic style - mostly landscape, etc... the 7200 was a better fit for my needs.

Like picsman stated; I use a mid-2014 MacBook Pro with a 15" retina screen, a 1 TB SSD internal drive and 16 GB RAM; which I found is not problematic for travel. I have it paired to a 27" screen at home. I store all original files on a separate SSD and then those files I plan to use are then copied to a second SSD which is my working drive. The 15" screen is easy to use in the field and I don't mind the little extra size over the 13" - which I pondered and considered for a very long time. But I was set on having a quad core chip which was only available in the 15" at the time.
A lot of people bash Apple for their price, but remember that they only use the very best equipment available in their computers - which has also been thoroughly test for compatibility.
I also use a PC at work so I am very familiar PCs as well - photography is a 30+ year hobby for me. I have found that when you build out a PC to the same specs with the same quality of innards - the price is comparable. So you should really look at which operating system you prefer. I found I can keep an Apple laptop for 10 years with out issues. It's really almost like the debate of upgrading your DSLR when the next best thing comes out. :-)

I have the Nikon AF-S DX 10-24mm f/3.5-4.5G which I use on a D7200. It is an outstanding lens. Very nice size and weight and very capable. I personally prefer to stick with Nikon glass on a Nikon body. I've used other brands and not had as much luck with quality then sticking to same brand lenses. I highly recommend you try to rent or borrow a couple of your choices to see what works for you.

I was in the same dilemma 6 months ago. Finally deciding to upgrade from my D300. I would recommend that you take a look at what you want your camera to do and be able to do for you. For me, 99% of what I do is still photography; landscape, micro, etc. I rarely shoot people - only friends and family at gatherings, etc... - so I was more interested in the construction and weather sealing of the product. I looked closely at both and chose the D7200. I was also unable to find one new so I bought a factory (Nikon) refurbished USA model through Adorama. It arrived within 2 days and only had a shutter count of 10 on it. It has been outstanding and I do not regret my choice. 2 memory slots (I shoot jpeg + raw) 24 mp, pop-up flash and construction were my deciding factors. Your requirements may be different.
I would heed the recommendations of staying away from gray market vendors. Everyone's advice here is sound on that matter. If a vendor does not state that it is a USA model - I would expect 9 out of 10 times that it is gray market.
The vendors recommended - Adorama, B&H, KEH - are all top notch and reputable. I've done business with them all over many years and never had any issues.
I would also highly recommend that if you are able to hold each of the cameras - rent them if possible - and test how you like button placement and how they feel in your hands.
Good luck on your decision as both are great cameras!

I use the Nikkor 18-200 VR first generation on a D7200. The second generation has a zoom lock on it. Either way - it's an excellent general purpose lens with outstanding reviews. The 18-300 is much bigger and heavier. I would recommend a review of Ken Rockwell's review of this and the other Nikkor zooms intros range; https://kenrockwell.com/nikon/18200.htm.
Best of luck with your decision process.

You might consider the Nikkor18-200 3.5-5.6 G which is a DX lens. It is smaller and lighter than the 28-300. Ken Rockwell gives it an excellent review here: https://kenrockwell.com/nikon/18200.htm
I use it on my D7200 for landscape and a general walk around lens and is incredibly sharp for a zoom lens of it's range.

I live in Spokane.
You might also consider Steptoe Butte. Outstanding views of the Palouse from there.
I would recommend staying in Moscow - it’s a larger town then Pullman and offers more in the line of hotels and dining options. Or, if you’re willing to venture south Walla Walla has excellent hotels and is the heart of Washington wine country which may also give you great photo ops. I found sticking the back roads and 2 lane highways (26, 127, 12, etc) gives you better views then the interstate. As previously suggested - definitely Palouse Falls.