I wouldn't leave it in without a bubbler
I used to have my H23.5 in Perry Lake KS, and I never left it in over the winter. I had a trailer and it was easy to yank it out and not worry. My biggest fear was not that ice formed around the boat, but that as it melted, I would have a hole in the ice slightly larger than my boat, and then wind and waves would batter the hull against the ice until all was melted. I shudder to think of the result of that abuse. Even with a bubbler you have to check to make sure that it is is working as intended, and I don't like to go to the lake in freezing temps to work on anything, especially something wet and electrical.