Nothing in VT fits that. Basin harbor club is probably the closest to what you are asking for. It’s in vergennes. Vermont doesn’t have a ton of kid stuff. Everything we have is spread out (water park at Jay, 5-6 mini golfs spread around the northern part of the state) some stuff in Stowe. But it sounds like you are looking for a resort area and that doesn’t exist on Champlain.

Look at lake George in NY. It’s 15 miles from Champlain. Has all of what you are talking about. Plus has outlets for shopping, and other things.