An idea:
A hefty deposit on your WAG bag. If you choose to not return it for your deposit, used or not, just leave it somewhere on the trail in sight. Somebody will return it for the hefty deposit.
I'm thinking hefty is $50-$75.
There are probably many devilish details.
Can you imagine the beauracracy costs trying to implement a program like that; let alone having a manned station for dropoff when you are trying to get back home after already having been awake for 15-25 hours.
