Like Gypsyman SWbradley1 said, I would use bait traps/poison but also, tons of mothballs. I'd put them in, around the truck, around the heater, air filter, and all around the perimeter inside of the storage unit being used. If it's going to be as cold as weather predictions say it will, everything will be looking for a warmer spot to nest.
Everything else listed above is what I would do. It doesn't hurt to let the truck sit for a few months, but on decent days in the winter months, can't hurt to take her out for a drive for an hour or so.
Probably can't hurt to have an emergency kit made, inside an ammo can or something similar, to keep in the deuce and your primary vehicle. Some extra fuel certainly can't hurt either, with random shortages popping up, not the best time to be caught with your pants down. The farmers Almanac as well as other weather forecast systems are calling for an unusually cold and snowy winter for the Northern states and Canada, but MI was certainly stressed in more than one article.