Perhaps best known for its long-running folk music festival, which draws crowds of up to 30,000 every spring, the Hill Country town of Kerrville is equal parts artsy and laid-back. Drive about an hour northwest of San Antonio to this community of 25,000, and you’ll find a welcoming, walkable downtown overlooking the shady banks of the Guadalupe River. People from all walks of life seem to coexist peacefully here. As I stood in line at Pax, a downtown coffee shop, I watched a group of middle-aged guys in cowboy boots and jeans quietly sip their drinks; next to them, two college students in maroon-and-white Schreiner University hoodies scrolled on their phones. A few doors down, a cat dozed in one of the lavishly decorated windows of…