Vegas seems like a super-bad place to fly, IMHO. The red areas of the NFZ map posted above tell the story well.
As noted above, the airport is RIGHT there, with low-altitude jetliners and private aircraft in the landing pattern all around the Strip and outer areas. Then there's the Nellis complex to the North, also RIGHT there up against the city, with heavy and sometimes very heavy .mil flight activity.
There's also heavy and constant helicopter activity of people doing city/Grand Canyon tours from the airport helicopter area. If you're in one of the hotels on the southern end of the strip, you'll routinely see a couple dozen helicopters outside your windows a day, and you're not seeing all of them.
The Strip is busy, crowded, and chock full of RF sources, obstacles, security and law enforcement. Even if it weren't a NFZ, it'd still be a terrible idea.
It's obviously a different story if you get out of town, out towards Lake Las Vegas, or the hundreds of miles of empty desert outside town.
But in city/Strip zone, it's both a technical no-fly zone, and just NOT a good idea.