I think your husband doesn't really remember the fair that well. It is just a dirty old fair on dirty old fairgorunds, and I don't ever remember fireworks, maybe someone can correct me on that.
BTW, the Wayback Machine is your friend. Here is an archived 2007 website with the prices. It is two years old, but it should be close:
Arkansas Oklahoma State Fair - Kay Rodgers Park
The Courtyard is nice, it is right next to the Holiday Inn, which is also nice. Both are within walking distance to Garrison Avenue, which would give you places to eat and maybe a little night life.