Loot supply from enemy players
If you defeat an enemy player, you should be able to loot his/her corpse to pick up the supply he/she carries with him/her. If the player respawns at a waypoint, he/she drops the supply (it’s depleted to 0) as a bag to the ground at the position he/she was defeated at, able to be picked up by any other player.
Ability to deposit supply
What about the ability to deposit supply to a depot if you don’t need it or want to accelerate the supply line by carrying supply between camp and fortification?