Welcome JC, interesting video, awesome land and opportunity for you there! Would love to see some pictures of what you and your friends have found so far, especially the one the "kid" picked up.
One thing I think you should figure out for your area is what materials were commonly used to manufacture blades, arrow points and other tools. The AACA website lists the following lithics as most common in your region:
-Agate
-Basalt
-Chalcedony
-Dacite
-Franciscan
Will be watching and hoping you post your finds, thanks!
-Ignumbite
-Obsidian
-Pertrified Wood