Wow nice pics! Banded geko? wow! I had no idea there was a geko species in the desert! I have to add that to my desert wildlife bucket list. I have yet to see a sheep either.
I discovered Afton Canyon in May of 2010 when I drove the Mojave Road. I hiked to the caves and battled a horse fly there as well, I grew up in VA on the east coast and those things make me nervous as hell!
Why are bullfrogs bad? Do they eat larvae or other critters?
Also, I will NEVER forget the water crossing of the river after Afton- it was my FIRST trip in my new 4Runner 4x4 (my desert rigs prior: '73 Nova, '80 280ZX, '80 Camaro HAH!) and I got super nervous halfway across and stepped on the gas and water started flowing onto the hood- GULP!!
Amazingly all was well, I opened the hood right away to see if Moses and climbed under there and helped me out but really it just looked like the fan had sprayed some water around but no signs of significant submersion at all.

I plan on doing the Mojave Road again but extending the trip much longer and incorporating much more hiking and exploring on foot.
C