Several good suggestions in this thread already.
For my money, the best places that fit your criteria are all either in Northern VT, Sugarloaf or Whiteface. The problem with the latter two is snowfall, or lack thereof. Whiteface gets less than 200"/year and Sugarloaf comes in right at that figure.
In contrast, anyplace in VT from Sugarbush up to the QC border gets at least 275" and, in the case of Jay Peak, 350". That makes a big difference if glade skiing is a priority, as the more snow you get, the longer and more reliable your glade skiing season is going to be. Of the choices in VT, MRG has few groomers despite great fall lines, glades and a family atmosphere. Jay Peak has the glades, family activities and some decent fall lines, but is not known for his cruisers. Bolton also lacks the long fall lines, though checks the other boxes.
As such, best choices for your criteria are Stowe, Smuggs and Sugarbush. Smuggs is known for its family programs but has a bad-ass and pretty uncrowded mountain to complement them. Stowe is probably the best single mountain in the East, but tends to be much pricier than the rest. I'm a huge fan of Sugarbush for its mix of big mtn skiing (in a VT context) and family friendliness.
Of course, YMMV based on personal preference. If you want a real mountain town nearby, then Stowe and Whiteface become more attractive. If you want a more rustic experience, then it's Sugarbush.