Although its the holidays, I decided to go into work today, to check things out with the computers. Each night, our server runs housekeeping, which just merges the database updates done through the day into the master file.
Well, after it does that, it calls up our laptop, and replicates the databases there as well, so therefore, we should have two copies of the data - one on our server, that is used by all the libraries, and one on our laptop, which is used on the bookbus.