Nothing wrong with hunting for your own stuff, I do it myself; however I like to always have a supply of good knappable material on hand to turn to gravel or points. If you want some Edwwards Plateau chert, go to Campwood, Tx , take highway 55 South toward Uvalde. The highway crosses the Nueces River about 5 or 6 miles south of Campwood. You can pull off the highway and park under the bridge where you can load your car or truck down with all the chert you want. A lot of it is some of the nicest rootbeer you've ever seen. Various other colors also occur. Good luck and have fun.