If they must come here, How about Nellis AFB?
Maybe 20 or 30 miles from area 51.
Nearly as isolated as Cuba, full of servicemen, and the locals could easily be persuaded to be suspicious of arab-looking strangers with poor english.
Second place would go to Eareckson Air Station on the tip of the Aleutian island chain. We could let them swim home from there.
The live fire range? Sounds like a plan.