Welcome to iRV2.
A LOT depends on your BBQ, does it use the 1lb bottles or attach to a 5 gal cyl.?
The fitting on the RV should be regulated pressure , so if your BBQ has a regulator in the hose at the cylinder , that regulator has to be removed, and a supply hose with a fitting to the RV purchased.
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.