How far up into the ADKs? I live off of Exit 18 of the Northway. There is a brand new rest area a couple miles before the exit, going North, and it has 4-5 charging stations in it. At least one of them is a "quick charge," which I know because my neighbor uses it on his way home every day to save his own electricity, LOL. There's also 4-5 Tesla charging stations at the Aviation Mall (Exit 19), which is a little bizarre since that mall is on life support.
North of that, I'm really not sure what's available, but I'd be shocked if the neighboring counties' tourism boards have not been/will be way out in front of this. They know who their visitors are ($$$).