6:45 a.m. ??????????
I try to leave the park between 7:20 - 7:30.  I usually park in the lot nearest  LBJ.
I say "usually" because they are doing some construction on the trail and the lot may be closed.
When you get there, you can call me on my cell at:  214-783-3181.
 
At 7:20 it will still be sorta dark, I am bringing a light I never got to try before.