Looks like you'll be using I-40 mostly, no sweat, always plenty of places to stay along the way. You can do it in 3, looks like about 1900+ miles from you but why rush, if you have the time take 4. I like to stop and pull the camera out and get some shots. If you go to www.mapquest.com and punch in the directions they'll map it and give you hotels, gas and food along the route (buttons along the top)