By car, I'm guessing the total travel time is about two hours.  By bus, we will get on Loop 410 and head northwest to the I-10 / 410 interchange.  We will get on the spaghetti bowl taking the 10 West exit to Kerrville/El Paso.  We will stay on I-10 West all the way through Leon Springs, Boerne, Comfort, and past the Hwy 16 exit for Kerrville.  The next exit is Hwy 783.  This is the exit to take for Harper.  We will head northwest on 783 and I'm guessing it is another 25 miles or so on a very winding, hill-country road.  When you enter Harper, you will turn right on Hwy 290 and immediately get in the left lane so that you can turn left into the school district athletic facility parking lot.  Again, look for big yellow school buses.