The Dreaded Winter

[RagingRobert]

All I can do during winter is take the 20 minute drive every 2-3 weeks and visit my trailer in storage. All I do at the trailer is a visual check of everything and top up the peppermint oil which has worked great btw, no signs of the dreaded mice. Question, I'm taking my 22rbs in for a recall fix in May. What other things should I have them look at or service after the first season of use and the 5-6 months of storage?
You guys with big driveways and mild winters have it made.