The water heater barely uses pretty little lp. It’s a horizontal tank and I think it’s about 18 gallons. It’s my heater that uses it quite a bit. I was out for about 6 nights....cold nights and days and I went through most the tank and I wouldn’t have minded using it a lot more. I love the extend a stay idea. I think camco makes one. So question 1 is are those adapters safe? I don’t mind carrying a tank since I almost always have a trailer. I don’t think a larger tank will fit but I’m open to ideas on how to stuff something larger in there. How big can I go?