You may want to look at this thread:
http://forum.opencarry.org/forums/showthread.php?45415-Nevada-(Open)-Carry-Pamphlet
Or read my short version:
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Nevada law (IANAL):
Nevada is a defacto open carry state and you may open carry if you choose. If you open carry in the high traffic tourist areas of Las Vegas you may have a visit from Metro or, Casino personnel may/will ask you to leave the property if you open carry in any casino. If anyone in authority in any private establishment asks you to leave you must leave under Nevada's trespass law.
There is no restriction on having a firearm in your car, open or concealed as long as it is not concealed on your person (unless you have a permit).
There is statewide preemption, but the Attorney General, on her web-site indicades that she may not think it applies in all cases.
http://ag.state.nv.us/about/faqs/firearms/carry.htm
If you have a permit that is valid in Nevada:
Out of State Carry Concealed Weapon Permit Recognition
*Effective July 1, 2012
In accordance with NRS 202.3689 (effective October 1, 2007) the State of Nevada will recognize the following States' CCW permit holders:
Alaska
Arizona*
Arkansas
Kansas
Kentucky*
Louisiana
Michigan
Missouri
Nebraska
New Mexico
North Carolina
Ohio
Tennessee
Rhode Island
South Carolina - Effective July 1, 2012
West Virginia
This law allows holders of valid permits from these states to carry a concealed weapon while in the State of Nevada. The permit must be in the possession of the issue at all times while carrying a firearm.
** NEW ** CCW Press Release re: S. Carolina Recognition
Nevada Department of Public Safety
NRS: CHAPTER 202 - CRIMES AGAINST PUBLIC HEALTH AND SAFETY
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You may carry concealed in Nevada ANYWHERE except:
Buildings at the airport,
Schools (including colleges) and child care facilitys,
Public buildings (that means Government buildings) that are posted or have metal detectors.
NRS: CHAPTER 202 - CRIMES AGAINST PUBLIC HEALTH AND SAFETY
That includes casinos, bars, clubs, restaurants, whorehouses (they are legal in parts of Nevada), ANYWHERE. They may ask you to leave for any reason, or no reason at all, and, under Nevada's trespass law, you must leave.
You may drink while carrying. The BAC limit is 0.10 (DUI is 0.08, when they lowered it to get federal highway money they did not change the limit for CCW).
NRS: CHAPTER 202 - CRIMES AGAINST PUBLIC HEALTH AND SAFETY
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I hope this clears up any questions. Nevada laws concerning weapons are, for the most part at NRS 202.253 through 202.369.
Have fun in Nevada. Bring lots of money.
Ken