I think this is a premium boondocking site in Texas. Weather was a little warm at the beginning of June (90's). Fishing is always great here. There's a water spigot and a bathroom! Made 3 trips to Winnsboro and hope to get back there. 

GPS Coordinates Latitude, Longitude: 32.9061135°,-95.3491721°
Typical rural cell phone service, fades in and out

Quiet, secluded spot between Las Vegas and Pahrump Nevada. First come, first served but it was very quiet when we were there. The Boondocking experience is my favorite part of camping/travelling and this was a great spot. Spent 2 weeks here and didn't come in contact with anybody! Other people were there but all well dispersed.  

GPS Coordinates Latitude, Longitude: 36.0430242°,-115.6175106°
Our elevation was about 6,000 ft 
No services but also no Fee (Free) 
Hiking for days