We are a family of 4 from Boston and we love Sunapee. Our kids are 9 and 8 and we can't say enough about how well organized Sunapee is for ski school. It's the total package. Drive up, drop off and know that your kids are having a great time as well as learnign to ski.
Sunapee itself is a modest mountain, but they make a ton of snow and it's so easy to get too. Why suffer the extra drive to the bigger areas only to find worse conditions?
Lack of good Apres Ski is moot since you're driving back to Boston after the day trip that's soooooo easy.