Yep, I JUST booked a room, 10 miles out, without a car, exciting.
No wait list means that at random come on back and maybe you'll get lucky, or maybe not.
When the Indy Housing and Convention was handling the rooms, a wait list did not seem to be an onerous task for them to handle. Getting not only any room downtown, but the specific hotel and type of room that I wanted had never been a problem, much less, "impossible".
to be fair, that was several years, and tens of thousands of attendees, ago.