You'll probably have no problems at all. Go enjoy! When you back into the site, it's possible the tow vehicle will be in the middle of the road blocking traffic. Don't let that bother you. Folks WILL wait. It's just part of the experience we all deal with. Someday, you also will be waiting while someone is unhitching and their vehicle is in the middle of the road. What goes around DOES come around.
Just back in, unhitch, even if the vehicle is in the road. After unhitching, park like you normally do (perpendicular to the trailer). If campground management doesn't like you parking your tow vehicle that way, and there's no other option, there is most likely an over flow parking for visitors. Just park the tow vehicle there and walk back to the camper. No biggie.
FYI, my entire rig is 59.5 feet in length. I've never had a problem as long as the campsite posted had a pad side longer than 35 feet.