California side, or Nevada side?
I'd check with BLM for maps of government land. My understanding is that even if a Rancher leases BLM land for grazing, it is still open for legal hunting. North of Reno, going up towards Susanville, or Alturas, are some very large ranches, I"d think doing some personal contacts with grange halls, feed stores, Fish and Game folks, etc. should point you in the right direction. Sometimes in real rural area's, the local country store is a good place to start asking. Remember, first impressions are real important...
Good luck,
Mark
