Everyone is different, and there's no saying right now just how many interviews you're going to get pre- or post-december, or if you're going to get accepted on Dec. 1, 2017. I would not recommend it seeing as it's always plausible that you get interviews post-December that you're going to need to go to (if you didn't get into a school or at least one you like on Dec. 1, 2017). It's not worth the risk!