Critter taking over my TC ... what to do?

Thanks Jim. I'm considering Host for my next camper. I do a bit of ice fishing in this wonderful state and do use the water system when not extremely cold. Does help having heated holding tanks but that heat only does so much. I fill the fresh water tank at home then dewinterize all the lines when I get to my location. I'm usually out for 3 to 5 days and enjoy using the indoor plumbing. I just drain the fresh water tank and rewinterize the unit before heading home. Really easy and takes little time. Would be more difficult if the winterizing valves were located between the cab and camper.