I've been thinking about his escape route all day. What I keep coming back to is the thought that he probably didn't go too far for several reasons. Because he seems to be impulsive, I don't think he has the control to wait very long to get started. Also, unless he rendered Hannah completely unconscious soon after leaving Tempo, there's the chance she could have regained her wits. If she had been drugged, the effects of GHB last a very short time so he wouldn't have long to get where he was going. If she was drunk and fell asleep, he might have a bit longer but I don't think he would have taken the chance she would regain consciousness while he was driving, IMO.
Afterwards, he could then have taken her to a different location possibly, but I still don't think it would have been far away. And I think it was all done that night because he could not afford to be missing too long afterward or take a chance someone would see him.
With regard to being a regular downtown, I think he trolled that area because he saw it as the best chance to get lucky without people becoming suspicious. He obviously didn't think he was being videotaped because of the controversy in town about cameras and the lack thereof, thank goodness.
ETA: I hope that LE revisits some of the areas they have searched closer to town because it's difficult to cover every inch the first time.