I would like to back up a bit and say it will help a bit but thats about all. People know they should leave all their garbage behind. People know they should not trespass, people know they should not take a crap in some ones back yard and leave a pile of TP behind. People know they should not be doing what they are doing 90% of the time they are doing it. Now if you put out more Porta Potty's and start writing 250.00 tickets for littering and tresspassing you would see it clean up in a hurry. Put a lot of LEO's on the rivers. Partner regular LEO"S with troopers so they can be stretched farther. You could have an off duty Anchorage LEO in uniform with a trooper. You now have an extra set of eyes and back up for the trooper. Use the money from tickets to pay for the expense and you would see it clean up in one heck of a hurry. In MN we went to handicapped parking in front of stores. The state spent a ton of money for education. They bought billboard space. Adds on TV and print. The problem on non handicapped people parking in handicapped spots did not change. THen they upped the fine to 200.00 dollars and it stopped overnight when people got bit for 200.00 instead of 5.00. That was about 15yrs ago and it got cleaned up overnight!