You have to have a non-resident sticker which can usually be purchased at one of the vendors on a big weekend and I believe the rangers have them at the ranger station. They are $20 each. A ticket will cost you alot more if you get caught. Consider the people around you also. If one person gets caught in camp without a sticker I'm sure they will check everyone in that camp. It's better to be legal than have to worry every time you see a ranger. If you get a ticket for not having a sticker it's your own fault and not the rangers fault. He's just doing his job. Every state is going to get their money one way or another.