It could be made so that after the group reunites, another quest becomes available to clear out Black Mountain (BM just as a example. it could even be to clear out Helios 1, Hidden Valley, or another such place) in order to set up a temporary base there. Once the quest is completed, the members you just reunited could take over the radio station and try to reach out to the former members. After a certain amount of days the base could change into a mountain with Enclave members patrolling around the hills instead of super mutants.
The only hard part in making this (that I, as a unexperienced moder can see) is the voice acting. Adding a quest that involves killing around 20-40 super mutants and replacing them with Enclave w/ PA couldn't be too hard... right? Then there is the Dialog.
Voice overs from FO2 could even be used, I guess...
Cheers,
Mk II
