I recently visited Mount Canobolas near Orange NSW, and tried to visit Federal Falls to get some footage (with relevant approval from Parks & Wildlife Service).
I was using a pretty standard backpack to carry the
M2P, 3 batteries, some odds and ends and a ~ 3Kg bucket of brickie's sand, just in case of a battery fire... (I was NOT going to be responsible for any bushfires - not after what we went through here in 2019....). The backpack weighed about 8.5Kg all up and the walk from the parking area to the Falls was supposed to be about 2Km.
Note that I am on a fairly hefty dose of immune suppressants which muck around with muscle strength and stamina. I'm not unfit though and have recently been walking constantly for 6-7 hours at a stretch around flat territory with a backpack weighing around 5Kg without significant problems, however it was 30 deg C that day and quite humid and the territory was quite hilly.
While the backpack worked very well to house all the bits and was quite comfortable, unfortunately I never made it to the falls. The track got a bit steep in parts, knowing I needed enough energy to get back out again, I turned back before reaching the falls and had a hell of a time making it back to the car, having to stop numerous times to catch my breath and rest my legs, to avoid overheating. It turns out I'd made it about 1.5Km (which felt at the time like it was much further!!). If I'd had a lighter form of fire suppression that worked in a bush setting I'd also have been better off, I have a fire blanket but I suspected that was unlikely to be adequate in the sort of bush I was in.
But I digress!! - The point is that while my effort failed, I had no issue with carrying the backpack and its contents, other than the energy it drained from carrying that much weight up steep inclines! I can vouch for the backpack as being a very useful way to carry the drone.