Thanks for all these details Rich, I remember you mentioning this trip before. My dad is coming up in a couple weeks and we are gonna drive to Quebec and Montreal but do Mt Washington on the way up and I was wondering if going from Portland ME would be better that up through NH charging wise.
Hopefully it'll be amazing for you! My dad made a million visits to NH since his childhood but had never gone up Mt Washington. One day, in his late 60s, I said get in the car and we did an impromptu trip up to Mt Washington and the auto road. The photos of him smiling and the memories of that trip are priceless to me.
I go up to Trois - Rivières, which is mid way between Montreal and Quebec, every June, 3 times with the Lucid. The EA in Dartmouth NH is an obvious great stop and once in Canada I've always done well with the Electrified Canada sister stations to EA. Not free to use like EA but worked perfectly. I'm sure there's other alternatives too. Download the EC app for convenience.
Enjoy the trip with your dad!