My husband and i will be moving from Orange County to Nashville in early to mid December. We're driving our cars out with a 7yr old, 4yr old and 3 month old. We'd like to drive a few hours in the morning, a few hours in the afternoon. Ideally stopping in Oklahoma City to see family. We'd love to time it so we can get out and walk around - possibly see some national parks en route to entertain the kids and get the wiggles out. Any route or stopping ideas/suggestions?