Mongo,
I never had a hard time getting a hotel room in Muncie. Even a couple weeks before the Nats last year...no I didn't get exactly what I wanted, but suffice to say I had a free hotel stay the entire week
Also, you can't beat the "scenery" at the local eateries, ie, Texas Roadhouse.
BTW, I'll be staying at the Signature Inn again during the Nats and IRCHA this year.