What kind of tank do you have now, horizontal or vertical? What is its capacity? I've never been crazy about carrying an extra bottle for the simple reason that space is worth its weight in gold. If you can afford it, I would spend the money on a bigger capacity tank. The tank on our Monaco is a Manchester horizontal 14.4 gallon tank and lasts quite a long time. New Manchester tanks, last time I checked, were around $500.
Fred
Retired Army Guy
2005 Monaco LaPalma 37PST
Workhorse W24 chassis
8.1L Vortec
Allison 2100 MH
Onyx Color Scheme