Yes you can get into the repeater from around the 175 mile marker to the 170 mile marker. The you can pick it back up From Williamsburg , Mo to Columbia, Mo. I can get in to the repeater just fine with a 50 watt mobile and a Nagoya UT-72G antenna.
The repeater is located in Mexico, Mo on the KWWR backup tower and the GMRS antennas are 400 feet above ground.