I had an Escape 17 (another brand of fiberglass egg) that I stored under a fabric cover in Oswego, NY (150" - 200" of snow each winter). Most of the snow is light lake effect stuff, but I still scraped it off the trailer once it got over 2' deep.
You may want to use a little extra concern about the Boler since it was designed without rooftop AC & may not take as large a snow load. Unfortunately, I've seen a few with caved in roofs here in the Northeast.
My current solution with my Escape 21 is to hook it up & head for southern Arizona!