Just my perspective (I may be wrong, I often am), but here's what I do when I travel. I average about 6 international assignments a year, with another 2 or 3 lower 48 flights where I have a shoot or am available for hire opportunities.
1. Unless you are lucky enough to have all the costs & risks built into a contract (unlikely, but possible), you might want to consider travel insurance for your camera gear, just in case anything happens on the trip? Airline "baggage insurance" is generally laughable; while its "free" it generally means you will get pennies back on the gear you lost.
2. Go as light as possible, to "get the job done", as you ALWAYS want to carry your camera gear, NEVER check it. For me, that's an absolute maximum of 2 bodies*, 2 lenses, 2 batteries, charger, double the cards I think I will need, a big thumb drive for backup, and a small cleaning kit, packed in the smallest, cheapest, but functional bag you can find. This doesn't draw attention at foreign airports & is light to carry around.
3. *For the #1 camera body think BLAT (Built Like A Tank). I only use Canon products, and I often now carry just one body, but it's a tough SOB; the 7D Mkii. This keeps my equipment insurance down, and it also means that If I need to borrow an additional lens from buddies while on location, that's generally not a problem (compatible with all EF & EF-S lenses).
4. Think "Gambling in Vegas" for everything that you take with you, if you are struggling with what gear you should leave behind. Mentally kiss goodbye to all the money you have invested in the gear you are traveling with; don't leave home with something that you can't replace through insurance or your own back pocket (if you decide to bear all the risk). Not much sense in saving up for $10-$20K of gear, then having to check half of it at the airport, and not being able to insure that half against loss or damage...
5. For a few bucks, I purchased a little item years ago, that has saved me having to lug tripods, monopods, and other long & bulky paraphernalia around. Here's the link:
http://banktech.co.uk/products/bank-stick-adaptor/. This little gizmo converts any standard or extending fishing bankstick into a monopod, and likewise with a fishing tripod. So, anywhere in Europe I'm probably only a few yards from an Angler with a spare bankstick or tripod, if I need to take a slow shot. Or, I can buy one from any fishing tackle shop, for a few bucks, then return it at the end of the trip for a refund.
I hope this advice helps? I'm just about to leave for an assignment; the pic shows what I will be taking with me.