I would *happily* go to SDC year round for craftspeople, food, shopping, and the culinary classes. Open it, and stand back, because I would be there! Add shows and you would see a Prarie Wind shaped hole in my front door every weekend from New Years to Spring Break that the roads were clear!
The rides are great, but I go to SDC for more than just the rides. Unlike a lot of Parks, I think that SDC has all kinds of rich experiences that don’t require a ride. If they build a few more show buildings for dark rides, it could actually go close to 365. Just institute a policy that any time the temp outside Hospitality House dips to 37 degrees, the Park closes. That should (on average) give the Citizens time to close the Park before roads freeze up and become hazardous.
The thought of opening the Park without rides (especially the coasters) probably leaves most folks cold (winter pun, get it? LOL) but I would gladly purchase a year-round annual pass in a heartbeat.