Another alternate fuel bus to look at is the Diesel/CNG fueled fleet at Pierce Transit in Tacoma, WA. They probably have more experience than anyone with CNG fueled vehicles. They have a pumping station on site to compress the gas, the fuel cylinders are mounted on the roof of the bus and they have achieved certain bragging rights in the alternative fueled vehicle field. That said, CNG is not practical for the individual RV owner and Pierce Transit could not have done it and would not have done it had it not been for taxpayer subsidies to public transit.
'07 Winnebago Journey 34H, ISB-02, MH2500
Toad - '08 Ford Taurus X
Blue Ox, Aventa
US Gear UBS