A
Weber Q can't be beat for RVing / camping - porcelain coated cast iron grill, stainless steel burner, no other parts to rattle around, minimal gas consumption. One can run a Q from a 16.4 oz canister, standalone propane tanks of your preferred size, a T off your trailer's propane tanks
before the regulator, or even off a low pressure quick disconnect trailer fitting
provided the Q's regulator is removed. I've tried them all over the years and find using a stand alone 5 lb tank the simplest - no hoses running across the campsite to deal with yet runs "forever", at most requiring one refill during the season.
Another advantage - the smallest Q120 / Q1200 stores perfectly in this
Sterilite Bin which keeps the grill clean & dry and prevents greasy cooking smells out of where you're storing it for travel, be it the tow vehicle or camper.