best route to bypass san antonio tx heading south

Camreal wrote:
You can take I-10 to Kerrville then hit hwy 173 in Kerrville down to Divine and on to Plesanton and I-37 south. Good roads and very light traffic.

This is the route we took from Kerrville in February on our way back from the Sweetheart Rally. Good trip. We did pickup 281 at exit 72 on 37.
As others have stated. If you are going through San Antonio midday (10am to 2pm). Just take I 10 to I 37 to 281. Should be no problems.