My 27 gallon goes in the bed of my truck behind the 5th wheel hitch and the tailgate. It is the last thing that is loaded before travel. I do strap it down so wind doesn't move it around.
2006 GMC 2500HD CCSB 4x4 Duramax/Allison, Titan 52 gallon fuel tank, Prodigy Controller, B&W Companion Hitch
2010 Jayco Designer 35RLTS, Cummins/Onan RV QG 5500 EVAP, Progressive Industries EMS-PT50C, TST Systems 507 TPMS, RV Flex Armor Roof