You bring up a great topic Slow....While it's a hassle to do a lot of maintenance and some will blow it off....it's a lot easier to do it in the fall, rather than let it sit all winter with maybe pitch, sap, bird crap etc...on it and then want to clean it. This is especially true if it's an aluminum one.
Also make sure you clean up the galley really well, like from stove splatter or overspray from Pam, if you have a built in stove. It attracts dirt and sometimes doesn't want to clean all that easily over a winter of storage. I got Pam overspray on a fender during a waffle spree...
Clean out any food stuff as that can attract bugs and mice, besides, if you forget it's in there, chances are, it might be stale next summer anyway.
If it's an aluminum clad tear, check your screws on your trim and make sure if it's starting to loosen or the butyl has all squished out, take care of it....better now than doing a lot of resto work later when you really want to just load and go. Water loves to find a way in.
Although I store mine indoors, I'm a big fan of washing the tear or standy after every trip, but then mine are painted so don't stain like a mill finish. That way I can see any new road damage, and gives me a chance to clean off road oil and grease from over-lubed drive lines on big rigs. I give them a coat of wax in the fall.
You're either going to do it now, or later and if you just do it before it gets out of hand, you'll protect your investment and avoid a headache when you just want to go. Other opinions may vary. Doug