Most students take the default "State" test. Instead, go to Advanced Search > Region = 7. These tests are written by Region 7 teachers and include district-specific nuances (e.g., local soil types in the Blackland Prairie vs. Post Oak Savannah).
That said, a few restaurant and fuel stop recommendations seemed a couple of years out of date — two places I tried had closed. The binding also feels a bit stiff, making it hard to keep open on the passenger seat. Still, for anyone driving 18-wheelers or RV’s through Region 7, this guide is a smart backup when cell service drops (which it will, frequently, out on the caprock). texguide region 7