I may be having one of those mental blocks, but something didn’t register right with me. Usually, the site length refers to the TT, not the total length. And one parks their TV alongside or at an angle to the TT to fit in the space. Your TT is moderate size or as bit smaller and I can’t believe you couldn’t get it in many of the campgrounds there. But for the life of me I can’t remember Canyon. Are you sure there wasn’t a miscommunication with the party? You do realize Fishing Bridge is your only option if you want hookups. Otherwise you’ll be dry camping or in a campground outside the park.