Love this thread.
Rob, unfortunitly I'm in NH just between Maine and Vt so I can't help, otherwise I would have loved to cross another state off your list. I started doing something like this a while back, just keeping the states listed on a scrap of paper. After forgetting to make notes on too many trades I just gave up.
I do recall trading with someone in Maine not long ago. I'll see if I can figure out who and I'll message you if I find their name. Also looks like the person you traded with in NH is the next town over from me.
I doesn't look like Garrison has logged in for a few months but I'd love to see the updated copy of his map since the original was from 2019. What's it looking like today?