Yes I go to the Midwest Reptile Show at the Indy Fairgrounds (customer, not vendor) and will be there browsing again on the 20th. The Indianapolis show will be confined to just one of the smaller buildings at the fairground, with vendors set up at their tables with their available reptiles/products display. You will have to pay separate parking from the show entry fee though. I think it may have been $5 for fairground parking and then the $5 show entry fee. I met some very wonderful vendors there who really enjoyed talking about the animals they produce - seems that's most of the fun of going is just seeing and learning. (Leave your coat in the car because it gets crowded and hot in there with all the heat lamps and bodies bustling around the tables!)
Here's the website for the Indy show - they have a vendor list.
http://www.midwestreptile.com/welcome.php
You should have no problem finding live or frozen feeders, and no end to corn snakes, ball pythons, boas, etc. Plus dry goods, etc.
There's also the much smaller Noblesville show on first Sunday of the month at the Hamilton County Fairgrounds (next is Jan 6), and one I haven't been to yet is the Fort Wayne show (next is Jan 5). You will also be able to find livbe and frozen feeders at the Noblesville show if you choose to go. $6 entry fee at Noblesville, but free parking. (I got frozen rat feeders there and didn't pay attention specifically to frozen mouse feeders, but pretty sure I saw a customer walking away with a bag of frozen pinks.)
Here's the website with the schedule for the Noblesville/Fort Wayne (and other locations) shows:
http://indianareptileexpo.com/
I might go again to Noblesville on the 6th, but not sure.