I normally avoid full hook up sites because they cost extra. Using a campground dump station when you leave is typically free. Our tanks are large enough to hold our typical length stay in a campground. There are many state parks in VA that don't have full hook ups at all.
Don't fear the dump station.
I agree at most locations a hose is absolutely necessary. However I have been to a few campgrounds that had dump stations that really weren't designed that way. The opening in the concrete pad was probably 3' square. It had a metal grate of slates across it probably 2" apart. Underneath the grate the concrete bottom slopped to a drain that went into the septic tank. If each user washed down the "pit" it was all quite sanitary. That being said, a hose was useless because there was nowhere to attach the other end. Simply standing to the side of your drain on pulling it open allowed the wast to fall into the grate. I really liked the set up. It was easy to position over such a large area and required no hose. Quite efficient.