You can add all the individual clips to one sequence, sync them all up, and then nest that first sequence into a second sequence. Right click that nested sequence and select Multi-Camera>Enable.
Thanks for responding, but that doesn't seem to work. I see no "Multi-Camera>Enable" when right-clicking on this "second sequence," and furthermore I need more than one camera in my new multi-camera sequence, so right-clicking a single sequence doesn't seem relevant. Maybe there's something I'm not understanding about your suggestion?
when right-clicking on this "second sequence,"
Not the second sequence, the nested sequence, which is the first sequence containing all the synced media placed into the second as if it were a clip.
Thanks again for your help. So that "enabling" worked, but it brought me to another halt, which may be a different issue: After telling Premiere to make a multicam source sequence with sychronized in-points (which I set in each of three camera sequences), the sync failed.
So I'm still failing to use sequences for a multicam source.
1. Create a sequence matching the media.
2. Add your clips to that sequence, each camera on it's own track.
3. Sync those clips manually.
4. Create a second sequence with the same settings as the first.
5. Nest the first sequence into the second.
6. Right click that nested sequence and select Multi-Camera>Enable.