Tom:
we've always stayed home for the winter, with the RV in the driveway. I winterise by draining and by-passing the HW heater, using the air compressor to blow all the lines clear, then add the a/f just to the P-traps. I leave the pressure relief valve on the WH cracked open to vent it when the temperature changes.
After Monday, it isn't my problem any longer. The RV has been sold by the consignment dealer in Burlington. Unfortunately, they only got one bid on it in almost 3 months and it was about $12K less than they'd estimated and about $5K less than we'd hoped to get. I'll be signing over the title tomorrow morning.