"they pay".  Probably a lot if they don't have a license, what is the fine?  Undoubtedly more than a license or three.
As to RV parking, have you tried to book something in the summer?   Last time the wife and I did, had guests coming up for a couple of weeks and wanted them to see Homer so we took the RV down, we booked that about 6 months in advance and were lucky to find a spot.  WallyWorld is about all that's available, and they're starting to shutdown that option, insurance I suspect.  It cost us about $2K to get across Canada, and takes about a week, did it down in the fall and back in the summer.  The RV type tourists probably will spend the summer up here, and sometimes they even buy stuff here.