I've talked to several people lately about the lack of services in Arkansas. Couple of things come to mine. First, ABA is hard to find in Arkansas. There are a few consultants in Little Rock and some school districts in NW Arkansas that use it - but not much anywhere else. Equestrian therapy is available in Little Rock, Sherwood, and Russellville - that I know of. Aqua therapy is in Little Rock only - at this time. Services in general seem to be focused in Little Rock mainly, some in Jonesboro, some in NW Arkansas, Conway, and a smaller pocket in Russellville. The further south and southeast you go in the state, the fewer things are available. There are also about 1000 people on the Waiver waiting list. I strongly recommend parents applying for a slot to participate in the Arkansas Govenor's DD Council. Here is the web site.
This training provides a great introduction to the services that are available in the state and also how to get them!