Any option for re-filling MH Propane Tank from Small Tank?

BTW, you might not need to install an Extend-a-Stay to use one of those Blue Rhino-type cylinders. We don't have room to carry one of those cylinders but we sometimes stay at a place where a guy has one for us to use, and this is the only time we ever do that. We have it on the ground next to the onboard propane tank, and plumb into it directly by detaching the line coming out of the onboard tank and moving it to the cylinder.