Ventucopa
I know this area pretty well, from the ground. The site appears to be in a dry creek bed about 3 miles up Quatal Cyn road from Hwy 33. The creek descending from Quatal Cyn joins up with the much larger Cuyama Creek about 2 miles or so South of Ventucopa. Both creeks are currently dry, flat, and with sandy bottoms. There is rugged terrain rising from both sides of each, but as long as you stay in the creek beds it's like walking along a sandy beach for miles and miles.