To me...your trip north is planed ok. I will tell you that we have no problem when traveling back from Fl going from Fredricksburg VA to the White Mtns in one day. We are ok with smelling the roses at the destination rather than along the way.
The answer to your White Mtns CGs could be like this. The route from BH to B&J is primarily US RT 2, which runs through the northern end of the White Mountains. While in our neck of the woods, I recommend a trip to the top of MT Washington. There are 2 sides of the Mt to do it on . On the Gorham side is The Auto Rd. You can drive yourself, (depending on what you are driving)! Or go on a guided tour in a van to the top. The other way is on the Bretton Woods side which would be The COG Railway. Both are great expierences! If you chose the Gorham side there are 2 CG's. Timberland and White Birches, which are both in Shelburne NH. On the Bretton Woods side in Twin Mountain there is a KOA.
From Acadia to Gorham is about a 5hr drive. Then from Gorham to Waterbury is another 3 or so. The Bretton Woods side will not be in your direct route to Waterbury...but not that far out of your way.
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