I've stayed there several times over the last 2 years and my parking reservation has always allowed leaving and coming back. I tow an Airstream trailer and use my truck for transportation in the area.

I don’t see why you couldn’t. But I think I have only seen other drive-able RVs, not sure if I saw trailers there before. Does it say anything about but allowing trailers? We walked outside of the lot to the service road to meet our Ubers - so never drove in and out once we parked.