JimBart Loc: Western Michigan

Take the 10-24 and the 18-24 with a 1.4 extender. Keep yourself as light as possible, you want the shots not the weight. Been there with an overload …… no fun.

Kevin.M Loc: Forked River, NJ

I used 2 lenses last September when I was there, 24-70 and 200-500. Those 2 lenses worked very well for me on land and adventure cruise. Definitely take your 150-600mm! Have a great trip! ~Kevin

Seabastes

Beach Lady. You must be back home from your Alaska-Seattle trip. If it won't effect you're potential sales You might post a few images from your Seattle visit to share with the many folks that gave you destination advise.

bigguytf

Been to Alaska 3 times and took a lot of photos (Flickr Link. https://www.flickr.com/photos/allprophotos/albums/72157711727764822) after all the trips I if I had to go again I would go with something like a 24-105 or 24-135 and a 70-200 or 55/250. You do not want to constantly be changing lens as well as carrying extra weight. If you have a teleconverter you can maybe throw that in for your 70-200. Enjoy your self and take a lot of of pictures with the lens you have.
You might ask some people who use a Tamron 18-300 how that worked for them. When I was there I did not see many of them but it makes sense you get clean pics.
Have fun

BeachLady Loc: Surfside Beach, SC

Thanks for the tips!

unclesam Loc: endicott, ny

Take multiple memory cards (never put all photos on one card; it could get lost or damaged). Take multiple batteries as opportunities to recharge can be limited. a 24-70 will be most useful; 200 may be disappointing as wildlife is usually far away, except near rivers. Take rain protection as well. Take lots of images! When you return, make a story slide show as others will enjoy.

MDOlson Loc: Juneau, Alaska

They are related but live in distinctly different habitats. Brown bear are coastal bears, generally living along drainages within 50 miles of the coast. Because of their salmon rich diet, they grow much larger. Grizzly's are interior bears and much smaller. Their diet consists principally of roots, grubs, berries, small rodents, carrion and occasionally moose.

CamB Loc: Juneau, Alaska

Many Alaskans believe Grizzlies and Brown bears are the same thing. In forty six years here I have never heard a definitive end to the discussion. My belief is that they are the same. Fifty miles from the coast of Admiralty Island, home to the largest population of Grizzlies in the world, would put you on the other coast.

BeachLady Loc: Surfside Beach, SC

I'm not back - I haven't left yet...just posted on Saturday looking for tips. I'm going to Alaska mid-August, then Seattle on the way home. I'll be sure to post some shots, but it will be a month.

BeachLady Loc: Surfside Beach, SC

Great photos! Do you remember where the waterfall was, and that garden? Beautiful! LOVE the bear & eagle!

Bultaco Loc: Aiken, SC

We've drive to Alaska 4 times in our RV shooting wildlife using the 150-600 more than any other lens with a D500 on a MONO POd.

Wingpilot Loc: Wasilla. Ak

There’ve been some questions regarding brown/grizzly bears. Here’s a link that explains the differences between the two.

https://www.nathab.com/blog/grizzly-bears-and-brown-bears/

neillaubenthal

Northern lights from the moving ship are not really going to work very well…you need long exposures (seconds) so even with a tripod on the deck the ship's motion will…probably…affect them. I would still take the shots anyway but the mountains or trees or whatever might be blurry from the motion.

edit.

But yeah…not much dark this time of year up north so the likelihood is even lower. Didn't realize when I posted at first the time frame you were talking about.

DougS Loc: Central Arkansas

Black bear are easily seen along the roads; and elsewhere! Possibly the best place to see Black and Brown bears, is at Wrangell/Anan Bear Observatory, but only if you are on a ship that visits Wrangell, most don't.... While in Juneau, if you go to Mendenhall Glacier, look for bear 'evidence' (the black bears go to the outdoors outhouse!). While in Juneau, if you can, go to Tracy Arm Fjord, we saw at least 5 feeding along the banks, crushing and eating shellfish. Plus saw a sow and two cubs at Auk Bay (just north of Juneau). Best place by far to see Browns are Kodiak Island, Katmai NP, and Lake Clark NP! If you go to Skagway, take the train, good chance of seeing black bears along that ride. If you REALLY want to see Black Bears, take a drive down the Stewart-Cassiar Highway, in British Canada (and don't drive fast, or you may/will hit one!!!). While on the ship, around 11 p.m.-11:30 p.m., go outside to see the alpenglow on the snow covered mountains. We saw the cutest grizzly cub as it walked alone, along the ALCAN highway in the Yukon, about 60 miles east of the Alaskan border. My wife could have touched it (in theory!), as it walked beside of our car!
I used mostly my 18-200 lens (D7000), with maybe 10% in the 300+ range.
You will LOVE Alaska! And hate that you are on a 'cruise', because you will miss soooo much! Like Kenai Fjords NP,

neillaubenthal

Yeah…grizzlies and browns are the same animal…but the browns live near the coast and eat more fish. There must be some minor sub-species differences though because browns are…well…brown or cinnamon almost always and grizzlies run the gamut from cafe a latte all the way to pretty black. They mostly eat the same stuff although browns get more fish in the fall near the coast so diet probably isn't the reason for the color differences. Dunno.