Update on the camping front - we do have reservations as of today in Twin Mountain NH and at Hadley Point in Acadia NP area. We decided based on the advice so far to travel to Maine on July 2 instead of July 3. So the good news is that we will have 2 nights in NH (Jun 30/Jul 1) and 3 nights in Maine (Jul 2/3/4, leaving the 5th for home).
The not so nice news is that we now have 2 nights to get ourselves from Cambridge ON to Twin Mountain NH. This is where I need some routing help. We will be crossing the border at Niagara Falls. My initial thought was to hug the lakeshore (Following the Seaway Trail), then cut inland on Route 3. We'd take Route 3 through the Adironacks and overnight somewhere between Cranberry Lake and Saranac Lake (still picking a spot).
Questions - What's the best route through the Adironacks with a trailer? We need to make some time, but we also want a semi-pretty drive. How's the grade on route 3?
We will need to cross over into Vermont. Keeping in mind our ultimate destination is Twin Mountain NH (therefore Rte 302 into NH), what's the best crossing? I feel like it's not worth it to go as far north as Plattsburg?