Unfortunately that is not available at this time. Because the campers are pretty small, not much propane is used up. Most customers can go for 7 days + of full use before they run out with the tanks we provide. That would be running the refrigerator on propane, running the furnace, running the hot water heater, and cooking a couple of meals each day. Customers are usually pleasantly surprised. But I have seen a few customers over the years carry one additional tank if they are going to remote places and staying for a few weeks. Gear stores like Adventure Trailers in Prescott, AZ sell some nice (extra) propane tanks w/ a holder if you wanted to mount 1 more tank on the outside of the camper somewhere.