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.
who will collect my credit card at Crabtree Meadows when I enter the Whitney zone from the other side?
Right now one in two hikers just walk right past the bin with wag bags sitting there at the JMT intersection...
