For the last 10 years or so I have heard each year about how "this year" there isn't as many RVers as last year. I don't count the RV's but I have to say, I think that every years its probably more than the year before. Theres nothing like the opening day in the big tent :)
I'm sure that the town of Qsite is probably shooting itself in the foot by raising prices for vendor spaces...or the owners of the spaces. But it doesn't take a genius to know when to lower space rentals and when to raise them. If you have a hundred spaces at a hundred dollars a space, raise the price to two hundred dollars and lose 25 vendors, your still making more money.