My dog stays on a lead any time we are camping. He is a hound mix and will follow his nose to all the wrong places.
He loves camping and gets super excited anytime we open the camper. He knows when we are camping that he is to be on the long lead in the campsite and will wait to come out until he is hooked up. He is always walked on a leash away from home and even gets happy when you grab a leash at home because he knows he is going somewhere.
I know that not every dog is the same, but mine loves to camp. Maybe give it a second chance.