Since Vegas is very much a travel hub, it makes sense that the NN near it is a hub for many Ways (i.e. shortcuts to many areas of the Nevernever).
Thus,
What if the Nevernever area around the airport (or maybe the just the main terminal) itself is considered neutral?
Having a portion of the Nevernever considered neutral is an advantage because:
1) Maybe certain physical laws are muted (i.e. guns don't work) so that the place is naturally more peaceful.
2) Much harder to have someone waiting right outside, waiting to gank anyone leaving the neutral spot.
3) Easier to meet NN creatures that have a hard time looking like regular mortals (i.e. Grimalkin) in neutral surroundings.
4) Less worry about mortal authorities interfering.