This page has some FAQs and general information about Postcrossing meetups:
Short answer: anyone can attend, from anywhere. The planned activity is postcard-writing and socializing. Bring your own supplies, but we will have some postcards on-hand free for participants while supplies last.
Just realized that I forgot to make this post earlier: I’ll be there. I was planning on making a trip to Ann Arbor sometime in September originally; October 1st works for that instead.
Some photos from the library - lots of overflow space in the event we don’t have enough seating in the Muskrat Room. Bonus: some AADL postcard sets donated for the event.
Sounds fun; I sent some cards from there last August and everyone who received one loved them; I was meaning to head there again some time this year but had forgotten.
Note that cellular data signals might be bad there (but the post office has a wifi signal).
If I recall correctly, they aren’t open year-round. Last August, it was uncomfortably humid there despite the actual temperature being fine. I thought they closed after September for some reason, but it also doesn’t make any sense for them to not be open until at least Halloween. Hell, MI will probably be swamped on the weekend before Halloween and Halloween itself (and also on the 13th, which is a Friday). Something like the 21st or 22nd might work though?
Someone should probably call them to ask them about their hours in October though.