I would bet money that the restaurant was robbed by her abductor, and that he abductor is not a local. I would guess a man in his 30s or 40s. Either a transient immigrant or someone from the fair. They robbed the restaurant because they needed food and money and didn't want their cards to be tracked, if they even have any. They also didn't know of another place isolated enough to quickly grab money, so they went to the only area they know that's relatively isolated.
Due to the nature of their background (either a carnival worker, so has a better chance of having an iffy background than the average joe, or transient immigrant) their going missing would not be considered alarming or even noticed. Likely doesn't have a family.
Perhaps he was at the restaurant and returning to his car when he noticed activity at the church and saw kids in the lobby through a window and waited for an opportunity. It was dark out so it would be easy to see in a window with lights on and no window coverings.
This is what I think is likely, anyway.