I figure in a real nuke war Las Vegas wont be high on the target list.
I wouldn't be so sure about that. Creech Air Force Base and Nellis Air Force Base are both major military installations and are very close to Las Vegas. Both would more than likely be targeted in any major nuclear strike.
I dare say that every
military base in the entire country is currently targeted with nuclear weapons and would be attacked in the event of a full scale nuclear war.