Area 51 ain’t that far from Vegas. He could’ve carjacked somebody.
He should've driven his limo to Rachel, NV. There's a road from there that takes you to the back gate of Area 51. He could've just barreled through the double gate there.
Friday afternoon is a perfect time to do that, there's rarely anybody manning that gate.
Barring that, he should've stopped at the Little A'lien Inn, their chili is out of this world...lol.