In the last two RVs I have removed the filter system and hooked the lines back up. Think about it. Do you want a stagnate water pocket sitting in you camper
with old water that might stay there for a couple of weeks or more before you
use the camper again? And time to winterize, it fills up with antifreeze that must be flushed out, maybe? I do not worry about filtering water when camping. I have more fun things to do. IMO, If you are worried about filtered water, use a portable filter on your water hookup.