I wouldn't stress to much about it right now. I'm sure you'll get a test center within the 2 hrs driving range. For the June test, I signed up in late March/early April and got waitlisted. I couldn't find a test center available with 5 hrs of Washington, DC. I was totally freaking out. Checking possibilities of flying home to my parents house to take the test, but the centers their were filled too. I started checking all the major cities in the US where I knew someone who lived there and still nothing. I was panicked.
So I called LSAC and asked about it and they assured me that since I got in before the deadlines, I'd be guaranteed a spot, but they only open test centers as demand calls for them. I was on the waitlist until about 3 weeks before the test when I was told I got the DC convention center location...and whole 4 blocks from my apartment.
I'm sure its similar for you situation as well, but if you want to ease your mind, call LSAC and confirm.