The stickers you will need you can buy there. They require no info for the quad to buy the stickers. For EVERY vehicle going into the parking lot you need to buy a state park sticker (daily $8 seasonal ~$28). Then for every vehicle going out on the dunes you need to buy an ORV sticker $16.25 (Seasonal). You will need a spark arrestor and they check every quad. You will need a flag which the shops right next door sells them. (Duneland ~$20) As far as noise goes the law says 94db they will let you in at 98db. They do not check all of the time and they will not always pick the loudest out of a group. We had a group of 8 of us and they picked out the stock banshee to check sound on. Not sure why. What we do is when you want to get on the dunes if they are checking sound just wait till they are checking someone else and get in line. They will not pull two people over at once. The last little note I would like to make is don't speed on the entrance ramp and on the exit make sure you stop at the stop sign, they have been giving out tickets. Just curious when do you plan on going?