I agree with Tim. Bring water and a porta-potty or similar.
I have and do use a heater in my TT's to extend the season here in New England, but that is just for late fall early winter.
If I were going for something more fortified against the elements, I would berm or skirt with straw bales around the outside and Frost King window treatment inside.
Protecting the waste tanks could be the biggest challenge I think. Tank heating pads for them and/or keeping them empty.
Hotel reservations would possibly be the cheapest solution.
P.S. Welcome to the forum. Enjoy your "new to you" TT and post some pictures! We like to see peoples pictures.....even canned ham 1949 Bell Woods!