Dave, if you don't need it before the rally there is a Camping World in Elkhart.
The biggest problem I had with the little blue wagon was knowing when it was "almost" full so I could close the dump valve. When it filled up the flow would stop but closing the valve still left the little hose full of black "stuff" that had to go somewhere and the tank was already full. This was quite a few years ago and many people use them successfully so maybe they've improved them.
See another Montana or Mountaineer on the road? Flash lights twice, it might be one of us!
Steve Reigle (pronounced Regal)
Fulltiming since 3/21/03
'03 3295RK
'05 Ford F250 SD Lariat CC SB 6.0L PSD/TS FX4 4x4
Our RV Travels (now Firefox-compatible)