We love Circle Pine KOA! The staff is so friendly and helpfull, the food at the 'cafe' is fantastic (especially the flapjacks), the entire place is kept up very well and very clean that we get spoiled and expect that type of service everywhere else (and rarely find the same quality).
Hate living in the house which is like a box.
So I like Tent Camping.
You might check out Desert View campground. It's at the eastern end of the canyon. No hookups but it is a very nice campground. We stayed there several years ago in our Flair. There are several back-in sites which will accomodate your 34' coach even though the rangers say 30' limit.