That's not really much time.
Say you finally get out the Airport at 12:00,
then it will take 1/2 hour to get anywhere in Mobay.
Now its 12:30
Spend 1 and 1/2 hours some place.
Then 1/2 hour to get back to Airport.

I would chill, with bags (and son) at the place for
Patties and Brew right outside the
arrival doors.

Great people watching at the airport.