NHDad wrote:
We are doing Niagara Falls on the way out so heading back that way and taking I90 where we came from would not be my first choice. We are in Southern NH.
It appears we could take I-80 for the majority of the way, once we get back to the new England area I know my way.
Right you are, and you stated as much—I read your first post too quickly. My apologies.
I-86 to I-88 (as suggested by Matt) is a nice drive, although there aren't many attractions as such along the way once you get into New York state. (I am not familiar with the first half of his suggested route.) The Corning Museum of Glass is far more fascinating than it would at first seem, and is a great place to spend a few hours at.
If you go along I-80, you could stop for a day or so at Knoebel's amusement park (in Elysburg, PA). It's a very nice, quite traditional amusement park, and they have a couple of associated campgrounds. If you like Canobie Lake, you'd definitely like Knoebels.