With few exceptions, OC is legal in Nevada.
https://www.nevadacarry.org/
Caroline county is grandfathered in and can restrict.
I think you mean to say Clark County, that restriction is gone. There is no handgun registration in Clark County (Vegas) and if you are not a prohibited person, then someone loaning you a firearm is not illegal as I understand it. Here is a list of places off limits.
Is open carry legal where I live or where I'm visiting?
Open carry is legal in every municipality of Nevada. The state legislature has prohibited cities and counties from passing their own regulations on firearms. City and county laws which prohibit carrying weapons are in violation of state law. No local laws or regulations may be more strict than state law. See: NRS 244.364 (county), NRS 268.418 (city), NRS 269.222 (town), NRS 407.0475(c) (state parks).
State Prohibited Places
You can legally openly carry everywhere except for the following places:
On the premises of a public school, on the property of the Nevada System of Higher Education, or a child care facility without written permission of the college president, school principal, or head of a public child care facility, including in the parking lot (NRS 202.265). This includes guns anywhere inside a car, even in a locked safe/container.
A private in-home child care facility, except by the homeowner(s) or residents (NRS 202.265).
The secure area of an airport (for instance, employee-only areas or past the TSA checkpoints).
The legislative building or wherever the legislature is conducting business (NRS 218A.905).
Note that a 'child care facility' includes a private daycare or an in-home daycare.
The Legislative Counsel found in this opinion that open carry is permissible in public areas of public buildings.
Federally Prohibited Places
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Firearms, loaded or unloaded, concealed or openly carried, are prohibited in the following places
Inside federal facilities (including courthouses and offices like a Social Security office) 18 U.S. Code § 930;
On military bases (military personnel should refer to DoD policy and post orders);
Post Office property (includes the parking lot), but not post-office windows in stores (contract stations), 39 CFR 232.1(l);
VA hospitals/facilities including federal veterans' cemeteries (carrying) 38 CFR 1.218 (13).
Firearms are banned in "a building or part thereof owned or leased by the Federal Government, where Federal employees are regularly present for the purpose of performing their official duties" and includes essentially all parts of federal court facilities (18 USC § 930). 'No weapons' signs must be posted at federal facilities in order for someone to be convicted (but you may be arrested).