A number of years ago I held a job in the backpacking industry. A movement came up to create a tax similar to the P/R fund but that would be applied to backpacking and camping equipment. Funds would go towards applicable causes like land access, land upkeep, improvements, etc. You should have seen the industry rally against this proposed tax! Talk about it got dropped pretty quick.
As a hunter and fisherman I am proud that I help support the land and the critters that live there, whether I hunt or fish them or not. Backpackers and campers get to ride on our coat tails and I'm 'kinda pi**ed that they don't help carry the load.
Guy