Happytrails(bill) ;D,

I will vouch for the Mr Heater Buddy Heaters, in fact we have two of them. The going price is around $100. I managed to get both of mine on sale, one for $80 and the other on end-of-year clearance for $60. We use them in our pop-up one on the table pointed towards one bunk end and the other on the stove pointed towards the other end. On high they will maintain 75+ degrees even down into the low twenties. We usually only run one at a time on low and sleep under a down comforter, or use sleeping bags. With the insulating factor of the TM one should be more than sufficent. Defintely go with the long hose rig. We use a 20# LP cylinder in a milk crate sitting on the ground and lead the hose out under the canvas. Hadn't thought about making a longer hose and running it to the spare front tank. Good idea!

Aaron