I'm with Mike, "Informal" is good. hwy 7 to Hot Springs is OK, but thats about it.
Jasper area is about as centraly located as its going to get.
The HUB (just North of Jasper) is a pretty cool place, it aint the Ritz but 40 - 45 bucks a night, double occupancy is hard to beat. The food is pretty good, they got meeting rooms and when you pull out of their driveway onto hwy 7 theres a curve right away! You can be on 123 or 74 in about 10 minutes.
Most of ya'll already know about "The Cliff House" and the "Ozark Cafe" in Jasper for further great eating opportunities.
I would say the first 3 weekends in may look good 4th, 5th and 6th, 11th 12th and 13th or 18th 19th and 20th.
Actually the 11th 12th and 13th work best for me, and it wont rain that weekend either!