I use water from my onboard system just like I would in a s&b. I do have a particulate and also charcoal filter inline, but I see no reason to buy bottled water. Besides, the latest survey I read says the plastic in the bottles causes cancer. Of course I will be dead from breathing camp ground air before the water bottles get me!
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