I'm a May 1st hire. I was initially awarded IND in May but got ORD in June. That's the easy answer. The quirky part is this, Republic awards bases 4 month out. So even though I was awarded ORD in June I wont actually be there until October 1st. I emailed the appropriate people and asked could I be moved early. They allowed others to move early to other bases however my request to ORD was denied. It's possible you'll get ORD in your second bid, you may have to wait a couple months after you complete IOE to be there. Overall its not bad.

Also Its worth mentioning that you can always email scheduling a week out and change the base you want to sit reserve. So if you have 4 days of reserve in IND coming up, you can just ask to sit reserve in ORD instead of your actual base, say IND. They've been allowing me to do this with another base pretty often.