The Piute Tribe of Northern Nevada did close their Pyramid Lake and reservation to all outsiders last year with highway checkpoints on the state hwy through the rez. Everything is open now and I frequently fish on their massif Pyramid Lake each year.
Their website is up to date with all the rules and regulations. Pyramid Lake is also a U.S. National park and their police are very strict on speed limits. They do have two paved RV camping areas and dozens of unpaved waterfront locations for off road RVers. Their fishing and camping permits are pricey.