I found it allways so far ...
The worse is that they cannot be splitted, so if you store more then ... lets say 5(guessing the number) ... your supplies are unusable forever. :-/
Yes - this is my biggest problem with the system... if you send all your packs to camp, eventually I imagine you could run into a situation where no one in your party is strong enough to lift the stack out to split it. That's broken.
Maybe Hotfix 12 fixed this, but I can split the supplies. I sent everything to camp, opened the chest at camp, opened my inventory, held the Shift key, dragged the camping supplies to inventory, and it split them.
This means, all you have to do is send all camp supplies to camp instead of lugging them around.