I went to Himachal Pradesh to do some documentary filmmaking in September, and wrote about my gear loadout
https://www.redsharknews.com/production/item/5033-shooting-8k-in-the-himalayas.
There's a LOT to be said for traveling as lightly as possible, which means keep the kit small enough to carry on, you really don't want to be forced to check anything valuable into cargo.
For trips when I'm not expecting to do any serious hiking I go with my Peak Design camera backpack, but for trips where I expect to do serious trekking, I take my McHale expedition pack. For airline travel I take out the bayonets and roll the top down, packing the soft goods into my checked duffel and my camera gear into the rolled down bag. For hiking, I put the bayonets back in and move the camera gear to the top compartment -- hence I recommend the optional shelf if you go this route. It's also one of the lightest expedition packs out there -- rivaled AFAIK only by the CiloGear and possibly Kifaru packs. But for hiking, don't waste your money and weight on a camera backpack; they're a joke. They all pretty much share a spectacularly glaring design flaw, which is that they're based on the idea that you only need to carry camera gear, which for all practical purposes makes them utterly worthless for anything more than a casual stroll, plus they're pointlessly heavy. You'll get around 50L for 7-8 pounds with a camera backpack, but my Dyneema McHale is under 3 for 100 liters, not including the lid (which IS included in the weight). Pricey... but if you hike with your gear a lot, totally worth it.
At most of the airports, I had to pull out and show my camera bodies (A7r, Red Epic-W) and lenses, at Amritsar I had to pull out anything that didn't look like clothing... they even made us check in trekking poles, which was a first; I'd gotten used to having my walking stick attached to the exterior of my backpack, ice-axe style.
I recommend renting whatever you can, especially lighting and grip gear, but also keep in mind that in the hiking bits you and your crew will have to carry everything along with standard survival gear. And you really don't want to be wandering around in the mountains without your survival gear; you never know what will happen, especially in the mountains.