I bought a cheap whole house filter housing (Home Depot / Lowes) and a couple of 3/4" plumbing to garden hose adapters (one male, one female). Hook a short hose between the housing and your intake, hook up the housing to fresh water supply, mix a batch of chlorine/water and put it in the filter holder (no filter) and away you go!! Periodically stop and put another batch of chlorine/water solution. Another more complicated way: if you have an outdoor shower that has garden hose fittings . . . mix a batch of chlorine/water, put it in a container, put the antifreeze / winterizing tube in the container, turn your valves to pull from that hose, screw the shower / garden hose to the fresh water inlet on the camper.
2015 Silverado 3500HD CC Long Bed Diesel
2016 Silverback 33IK