I live in Elk City and work for a company that hauls frac sand mostly, but also does some flatbed work (usually drill pipe), rock, a little dry van, and just about whatever else you can think of when the need arises, with the exception of crude/water hauling. We run Oklahoma and Texas, with a little Kansas. There is good money in it, but, as with anywhere, you have to find a good company and be willing to run.