Blue,
I'm in the minority, I would always prefer to have a full tank when I need it. Now that has made me get up in the middle of the night in very cold weather to make the switch, but I always had a spare tank and warmed up quickly. I've done that in all my units I've ever owned with two tanks. I know most people don't agree but that's just always been a safety net for me. Now I do agree with having that electric heater, they can really warm up a camper, even the size of a Monty.
Just my thoughts, it's worth what you paid for them!
mac