I sanitize my FW system twice a year, rinse it 3-5 times to remove the bleach taste & smell. I carry 2 5-gallon jugs of filtered water for travel flushing/washing/drinking. When I get to the campground, I fill the tanks, using a blue filter on the hose. Then, I use the campground water for everything.
That being said, at some state parks, I have noticed quite a bit of silt in the water or a "rusty well" taste, so I use my "travel water" for drinking, coffee, and for the dog.
2013 Eagle 266RKS
2011 Ford F-150 w/3.5L Ecoboost & H.D. Tow Package