cuzins wlcome aboard.
From what I have seen on the weather channel you get spells of freezing temps. You are actualy in the danager zone and can find articals on boatus website about this. Folks in your area don't winterize the boat get hit with a cold spell and end up with a cracked engine block. As Roger said you need to either keep the engine warm (heated garage, ... not sure a light bulb will work depending on how cold and for how long) or drain the water out of the engine and exhaust system if freezing temps are coming.
Issue I have seen in your area is ice storms that cause power outages so heated garage or engine heaters don't work without power unless you have a generator.
In addition to the maintance Roger mentioned use gas stabilizer (probably most important thing next to not letting the engine crack).
1997 2400 SCR
5.7 Vortec / Bravo 2