Each time I go there, they simply insert a rod into your exhaust to check for a spark arrestor. They will check for the correct flag height too. If you want in quick during really busy weekends, I suggest not taking a trailer but set your truck up to go out on the dunes. I once had to wait 4 hours in a parking lot because I had a trailer. If I would have brought my truck only and stacked my quads in the back, I could have driven right onto the dunes, found a sweet parking spot and unloaded my toys.
