[kbs666]

If I was doing the PFS scenarios this is what I'd do:

I'd build each as a separate realm. Since they're set in Golarian I'd rely on the people who import them to have as much or as little of Golarian as they have, which is how it works at PFS tables in real life.

For DDAL you don't want to be doing all of Faerun too. So just do the scenarios. If people import them and want them to fit into a different world let them do that without to much stuff you've added in.