If it's concealed upon your person, you may not have it in any public building at the airport. Basically, NOWHERE concealed. Open carry is completely legal within the unsecure areas, like baggage claim, ticket counters, etc.
You can OC or CC anywhere that serves/sells alcohol, and can even drink (if otherwise legal to do so) so long as your blood alcohol level doesn't pass 0.10 (0.08 is the DUI limit)... I personally choose not to OC while at the bar. Whether it's legal or not, a visible firearm while parked at the video poker machine and drinking a beer is an invitation for trouble in more ways than one.
Standard private property rules apply. Trespassing only if you refuse to leave after being asked in person. Signs are irrelevant (because of course, you never saw their sign and are not required to know the policies of the business you are patronizing, unless it's a member only place like Sam's Club or Costco which has terms and conditions you agreed to prior to shopping there...and even then, it's not criminal, only civil, unless you're asked personally to leave and do not).
Casinos will give you a hard time in Las Vegas and Henderson if you attempt to OC. They'll either ask you to leave or require you to checkin the firearm at the security desk...just conceal it well and you'll be fine. Just don't drink too much, OK? Rural areas like Pahrump and northern NV like Reno are more lenient (so I hear).
LE is pretty knowledgeable about these laws and generally won't hassle you. No requirement to notify LE during a traffic stop. Concealed carry anywhere in the vehicle is OK with or without a permit. Concealed upon your person with permit only.
Concealed does not require completely concealed. For example, you can use an OWB holster and cover with jacket so it's sometimes visible.
No limits on ammo type, magazine size, and its OK to carry with one in the pipe.
Hope these basics cover it for you. Post any other specific questions....