Sanitize Fresh Water Tank
in my TT my manual said I should add about a half a cup of chlorine bleach to 5 gal or so of fresh water in my tank. Run all the water outlets (sinks, shower) hot and cold until you get the whiff of chlorine. Let that sit overnight and then the next day dump the the freshwater, put another few gallons in the tank and then run all the faucets until the chlorine has been run through.
Just got my 2014 Fleetwood Excursion 35C and I assume the procedure is the same (except it looks a bit easier to dump the freshwater tank).
I usually don't drink the water from the tank, but I would think sanitizing after its been sitting for a while would be a good idea anyway.
2015 Fleetwood Discovery 40G
2014 CRV w/EZ Tow