I drove it Dec 2015... There's a few minor issues that I recall, nothing major. It's a lot of long and straight... The part that goes into the park is a bit curvy, I don't recall any major grades or hairpin turns.
Once section, it passes very low through a dry river bed / run-off area, and flooding is possible, be mindful if there's rain during your visit.
The section of Bell Vista Rd outside Pahrump is like a ghost town (failed property development?). It shows up as all these streets and stuff on maps and gps, but there's nothing actually there, the roads don't exist aside from Bell Vista itself.
That section of road was in very poor condition last I was there. The speed limit was also really low - like 35MPH as I recall? You're in the middle of no-where, and 35 feels very slow, strong urge to go faster - I'm not sure if it's a speed trap, I didn't test it.
2013 KZ Sportsmen Classic 200, 20 ft TT
2020 RAM 1500, 5.7 4x4, 8 speed