Use some search engines and check out Fayetteville for White Rock Mountain, big place...take the GPS or go w/someone that knows the place!!!
There is a club out of Russellville that has some great areas to ride(rode w/these guys 2 weeks ago)...good stuff there too.
The Ozark Nat'l Forest has access all over the state that is OHV friendly...check in your area and even visit the Arkansas Harescramble website, there is a race in your new area near Mtn Home this season.
If all else fails, ride around until you see a truck w/a bike in the back and ask them where to ride..hehe
Good luck and happy trails.