Your situation may be different but in Michigan I do the same for the coach as I did with the TT. I have it next to the S&B so it is plugged in all the time. I do not cover but we leave for south in January. I do not exercise the drive train but will use the block heater prior to driving. rodent entry has not been a problem at this house but was at our other home. Normal plugging of all entry points, etc. for rodents. I also do not put it up on jacks.
Don't know if this helps but it may give you other ideas.