Like Utah,Idaho truck campers do not have a license plate..They have an RV sticker..I put my rear licence plate on the TC each time I load it so it can be clearly seen by the officers that pull me over..
The police get kinda crazy when they can't see your plates to find out who you are and a tiny RV sticker isn't a replacement for a license plate.
Idaho changed it's truck camper status a few years ago from cargo to an RV which is an RV sticker but no license plate..So when yo put that TC that hangs over the bumper on,the rear license plate is covered and not in "clear site"..From the rear any officer has no idea whom they are dealing with prior to contact with that person..Not a good thing for officers..
I believe Idaho requires both license plates of a vehicle to be in clear site and displayed in such a manor.Front and rear...That's my take anyway..