Parking a Truck Camper at a Tent Only space in Yellowstone

As soon as you put your TC on your truck it is an RV. You drive into a campground with your truck & TC and you fall under the rules of an RV. If you can get your TC into the campground without a vehicle, then you can argue that it isn't an RV.

As has been said on this thread, some campgrounds will allow TCs and/or other RVs to use tent only campsites. Other campgrounds will not allow TCs and/or other RVs to use tent only campsites. Every campground, camp host, ranger, etc., interprets the rule differently.