answer:
Hi Adrienne,
The Philly Zine Fest unfortunately seems to be a fall event nowadays, but you could get in touch with the organizers and see what advice they have. I also recommend Wooden Shoe Books as a source of zines. They've recently moved into a new space, and the folks I've talked to there have been super nice and helpful. You can also buy zines online from distros and stores in other cities.
Feel free to contact me personally to follow up: zines@barnard.edu.
Jenna