The issues of Texas Contract Archaeology Texas have between 200 - 300 pages & include the locations of 100's of Texas archaeological investigations. A good way to discover previous sites throughout Texas & what was excavated in detail. These issues can assist you in locating artifact midden/camp area's in your neck of the woods. No where else will you be able to find the exact sites that may or may not have been recorded as archaeological sites. If they weren't, then you could contact the landowner to allow you to make some test holes & the rest is up to you.