Yes, NV polling is terrible thanks to the Dem machine. However, the white population of NV is very Trump-y (especially if Mormons fall back in line, at least somewhat), and Trump could quite easily make gains here. Hispanics already turn out at very high rates here, and NV's Dem tilt is reliant on the Dems continually making further gains among them.
California transplants and the growing Hispanic population isn’t great news for the GOP. If Trump is winning here, he’s winning the PV which likely won’t happen.