We had a 2 inch receiver welded to the frame of our 17ft
Casita. We carry a bike rack with 2 bikes on it without any problems. The 17ft
Casita is very tongue heavy - our tongue
weight runs about 410lbs (propane tanks full) - with the rack and bikes 400 lbs. No sway or other problems. The Orbital Machine Works rack looks pretty slick - we probably would have gone with that if it had been available (one of the company owners has a Casita).
Good Luck,
Kathie