You wouldn't think camping in the lot would be such a surprise to locals.
The Hostel (which is close enough to throw a baseball and hit the Tram house) is so cheap ($94 a night for a room that sleeps 4 or 5), that the locals probably don't understand the need to put an RV in the lot.
I've never asked anyone what the local policy is on RVs... but if they don't even like car traffic, then I imagine that that RVs wouldn't make them happy either.
Hostel website - The Hostel | Teton Village Lodging | Jackson Hole, Wyoming
Read on another forum: "If someone held a gun to my head and said, "You have to move to Salida tomorrow", I'd probably do it. If they told me I had to go to Breckenridge instead, I think I'd just let them pull the trigger."