hey yall i am up here in Canada and looking for some info on winter storage. Just bought my first 5th a 2004 keystone outback 28' unit. for winter storage is it practical or necessary to cover the unit with a tarp? i was told to drain everything then run som rv antifrees in then drain everything again and leave the plug out of the water heater, but is the tarp thing necessary? also what do some of you do to ensure rodents stay out of the camper during the off season? thankx to all for there reply's.