What about Chrisner's place? It's been dug for many years but points keep showing up.
He is quite close to you and he charges $40/ day or $20/ 1/2 day. Opens at 7:00 am for 12 hours of digging.
Email for directions.
Lucas, I've got about 2 1/2 miles of live creek in Lampasas co. (west of Lampasas) not too far from you. It's hot and dry right now but if you want to take a chance on what we might locate it's free. If you're willing to try an early morning while it's cool drop me an email and will discuss it further.