I found a spot on Eight Mile road, just off i-15, near the east side of the national forest. I drove up the dirt road for a while until I found a nice flat spot for the night. 

I could hear some road noise, but had 3+ bars of T-mobile 5g service. Not another person in sight except for maybe 2 cars that drove by during the night. Plenty of cows and cow patties around though!

Bonus: Eight mile road was a shortcut to westbound highway 50 and a nice way to start the drive in the morning.

Basically a big open field on the side of a hill. Good views, close to the highway, and not many bugs. There were at least 20 vehicles on the Friday night I was there, but still enough room for more.

Lots of noise: generator running endlessly, music playing, kids yelling, etc. It was kind of like a busy campground with no campground amenities or designated spots.