With 160 gallons of capacity, you should be able to go just about anywhere with that coach! Even at 8 MPG that's 1280 miles cruising range.
Propane is a wierd business. Pricing varies depending on whether you own the tank or not. What color your tank is. How much you buy. What your going to use it for. How much you bought last year. What direction the wind is blowing. Thankfully gasoline and diesel fuel do not have such wacky pricing. I think propane is a wonderful fuel, wish everyone else sold it like Flying J does, by the gallon.
2003 GMC 2500HD 4X4 D/A Ext. Cab
Propane Powered Honda EU2000i
Lots of Hot Sauce!
Air # 283