Please note NRS 202.3667, especially the part highlighted in red, if you have a CCW and are carrying concealed. If you have a CCW, but are not carrying concealed, this does not apply.
NRS 202.3667
Permittee to carry permit and proper identification when in possession of concealed firearm; penalty.
1. Each permittee shall carry the permit, or a duplicate issued pursuant to the provisions of NRS 202.367, together with proper identification whenever the permittee is in actual possession of a concealed firearm. Both the permit and proper identification must be presented if requested by a peace officer.
2. A permittee who violates the provisions of this section is subject to a civil penalty of $25 for each violation.
Of course I may just refuse on principle anyway, since it's not criminal to refuse, and carries a maximum
civil penalty of $25.