Where should you dewinterize?

Flush the pink stuff then sanitize the system, fresh water tank, pump and water heater, let it set with the bleach and clorine 24 hrs then flush everything once except the FW tank, flush it twice. Doesn't hurt to dump it all on the ground while at home.

When I winterize I blow out the pink stuff after I run it through the system so it doesn't stay in the system.
When spring arrives, I just hook up my water hose and I'm up and running.

Dewinterizng doesn’t take a lot of water. No problem doing it at home and draining at first stop.

At home. I want to arrive at a campsite ready to camp, and lots of Western campsites are dry.

I winterize with the RV antifreeze method. The antifreeze stays in the piping all winter. This coming week I plan to dewinterize at home by partially filling the onboard water tank then use the water pump to run water through the piping. I open the faucets, inside and outside shower one at a time and collect the antifreeze until the water runs clear. I dump the antifreeze, which is non toxic, down a sink in the house. The little bit of antifreeze in the section of piping to the toilet winds up in the black tank. I then sanitize the entire fresh water piping system with the standard dilute bleach solution (1/4 cup of bleach for each 15 gallons of water system capacity). I let the solution sit for a few hours then drain and refill the water tank and water heater and flush the dilute bleach solution out of the piping system. The dilute bleach solution gets drained onto the driveway and winds up in the street storm drains.