I don't know your travel dates, but I've been to this show a few times and really enjoyed it.
http://www.mainequilts.org/Quilt_Show/index.html
Keepsakes? Meh.
I've been to bigger and better. Also smaller and better. If you happen to be passing right by, then go in. I vaguely remember a long ride on a 2 lane highway to get to Center Harbor.
The only shop along your route that comes to mind is:
https://fieldstonehousefabrics.com//.
The website doesn't look like much but when I was there years ago, it was unbelievable. You couldn't even walk in the place it was so paced with fabric. They vend at large shows, and the stock in their booth is usually more than most quilt shops. Definitely call before you go. It's right off Route 88 past Binghamton, so it's not out of your way.
Have a great trip.