Adapting a BBQ Grill to a camper tank

[kwolff7]

We are looking for a small gas grill to hook to our camper propane tank. We have a hose and a tank regulator that will connect to a grill. At Lowe's the other evening, when the clerk started to ring up a grill we were planning to purhcase, a red flag came up that said it could only be used with the small canister only. As we look around the campground many are using their large tanks adapted dwown to the grill. Any advice.