After 10 years of camping, we finally ran into a 50 amp site with no 30 amp plug. The campground had just had electricity ran and for some reason had several 50 amp only sites. Luckily it also had a 15 amp outlet on the receptacle. We plugged in our 30 amp TT with our 15 amp adapter and the next morning hit the local RV store for a 50-30 dogbone. When I mentioned the 50 amp only site and needing a dogbone to the woman at the RV store, she just smiled and said "we've sold a lot of those this summer". Things could be a lot worse!:D