here is a possible solution, although it takes staffing
when I was on Aconcagua, we were given a burlap sack. it had to come back with trash and be presented at the park entry on exit, otherwise , a very hefty fine.
could the same be done with wag bags? bring it back used or unused,but bring it back. Would that work? lots of logistics and manpower to do this, but I think the hefty fine was something like $200 and made it work well in Argentina. Not sure about here in the land of crap-entitlement
