I used two 42 gallon Blichman's , mounted in our trailer and designed a 12 volt glycol chiller system that ran off the Land Rover battery during travel , while trickle charging a deep cell marine battery for over-night , even the PID's were 12 volt . The chiller system was flawless, the ale was kept at 63 degrees the whole return trip, I need to share this in the equipment section of HBT.
It was interesting passing thru Canadian and US customs , on a motorcycle , and two support trucks pulling a mobile brewery. Canada customs guys where amazed by the system and applauded the efforts. US customs detained us for nearly 2 hours ( beer was fermenting at the time , and a team of 5 inspectors wearing HAZmat gloves were puzzeled as to why I was doing this. nonetheless they let me pass into the US without too much grief. The yeast I pitched was created for me by Wyeast , cell counted and hearty, the guy's at Wyeast are awesome !, Hops Direct donated all the hops too...two great companies.