From Springfield MO, Tulsa/Oklahoma City OK:

 

Take I-44 east to Lebanon. Exit onto Hwy 5 (north) to Camdenton. At Camdenton, turn right at the stoplight onto Hwy 54 (east), you'll be heading north. Continue on Hwy 54 through Osage Beach. After leaving Osage Beach you'll cross the Osage River Bridge and go uphill to the light. You will need to turn left at that light onto Bus 54/Bagnell Dam (north end). As soon as you make the left you'll need to make a right on to Hwy "W" by the gas station. Follow "W" about 2.5 miles. You'll see our sign on the right in front of the Lakeland Mini Storage. Turn right on Gilliam (gravel road) directly behind our sign. Follow the road back 1 mile to the park entrance. Travel time approximately 2.5/5-6 hours.