J, I wasn't meaning to give you a hard time!
The road to Cottonwood Canyon is fabulous. When you get to the saddle, where the sign says 4x4 needed, it is correct. Put it in low and ease on down that rocky right turn. After that it is much smoother. The end of that road is little bit of heaven. Coming back up, stay in low and when you get to that last rocky climb, just power up it slowly without stopping. Cottonwood road comes to a definite end and does not go through. I don't know where Oasis in Fish Lake Valley is.
I've taken Crooked Creek road in quite a ways, but never all the way through. Wasn't sure if it came out anywhere. Good tip!
BTW, I've stayed numerous times at the Crooked Creek Research Station that you pass by. Always with a photographic workshop. Spent a lot of time around the cow camp, and explored many mines in the area. I've been up to Barcroft, too.
Here's on from DS Cow Camp you'll surely recognize.