My Miata has been in a storage unit since mid November. There's no power there, so the battery is in the garage on a NOCO trickle charger that runs an hour a day. I over inflate the tires, put Stabil in the tank, and that's it. I also set out several snap traps on the floor, just to check. Been doing that for 6 years now.
Next week I'll drop the battery back in, reset the tire pressures, and bring it home. Will change the oil soon.
A friend is an exterminator. The ONLY thing that works on mice is snap traps. Oils, dryer sheets, moth balls, blah blah blah... Waste of money. They do not care.