Dewinterization in Campground

I could do this at a campground but considering the time involved, I like to do it before my first camping trip. To dewinterize, I plug the HW tank, fill the water tank and run some water through the lines to remove the antifreeze. I then drain the tank. My drain is slow and that alone takes about 1/2 hour. I then refill the tank and include bleach to sanitize the system. I again run some water through all the lines including at least exchanging some of the water in the HW tank. I allow at least a 2 hour soak with the bleach. Then I need to rinse out the bleach by draining and refilling both the water tank and the HW tank at least twice. The whole process takes the better part of a day.