Arkansas has NO full service stations that I've ever seen. I've been to 15 out of 50 states and have only extensively travelled through about 7 of them. I've seen full service stations, I guess they're just rare in the south.
In Hawaii they did have them, but we were paying $2.20/gal (87 Octane) in 2001 anyways. This was Summer '01. They charged a few cents more a gallon and the attendents expected a tip, or that was the impression they gave me. ::shrug::
But anyways, by law they are required to preform full service ANYWHERE in the country if you show a disabled tag, except in the occasion there is only one attendent on duty, and that's obviously for safety reasons.