Originally Posted by
Plot Device
But ... would a chopper pad REALISTICALLY be located on a mesa and NOT on the desert floor?
Sure, why not? As long as there's a reason for somebody building a helipad on top of the mesa. Off the top of my head, maybe there's an automated weather monitoring station on top of the mesa which needs to be serviced occasionally. No road access hence the helipad.
Does that work?
Oh, we don't have many mesas here in the UK.

But Google told me that it was one of these: