Just guessing based on maps, but it's possible that the suspect stopped at the same gas station as Naomi at roughly the same time of day more than once. The suspect would have been traveling to Reno for work - perhaps picking up a coffee, Naomi was picking up snacks and heading to the shuttle. He could have followed her to the shuttle some time prior to the abduction.
At some point he decided that she was an easy victim and began planning where to park his vehicle to abduct her on the weekend when he wasn't working. He would have known her car, where she parked on the Walmart lot, when she arrived, when the shuttle arrived, and when was the best time to approach her.
If she did not have her usual contact with overseas friends that morning, they might have raised the alarm. Waiting until it appeared that she was finished visiting at 5:23 AM meant he could abduct her and no one would know until at least 12 hours later.
The convenience store where Naomi bought snacks
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The location of the convenience store along the highway from Fallon to Reno
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I havent read he worked in Reno. Did I miss something.