Quote:
5 players and 1 Narrator. There were times when we played with 6 players and 1 Narrator, but that was a little bit too exhausting. From my experiences I think that the perfect number of players is 4.
For Star Trek campaigns, it's virtually impossible to give everyone something to do in a single episode (how many times have you seen an ep where certain characters only make a short appearance?), so you definitely don't want to go the route of trying to fill all of the dept. head spots with PCs.