I live just a little southeast from you. As most say, winterize. It is just not worth the chance of freezing and breaking some of your lines. As we both know, it can be 70 one day and zero the next around here in the winter. Drain your water tanks, including the water heater, shut off the bypass valve to it and use your water pump to get the pink stuff in. Pretty simple, your manual should have instructions. You don't say but if you have an ice maker or washer be sure to do those.
I keep mine in an unheated garage and keep it plugged in all the time. My converter has a 4 stage charge system which keeps the batteries in a proper charge state all winter. If you have a good charging system leave in plugged to the 30 amp. Just be sure you check the batteries water level on occasion.