Great. I'm not certain, but I've got a feeling that Reveille will stick around as well, so that'll be four out of five. And if not, I'm comfortable NPCing them through this encounter and recruiting two more afterward. The chaotic nature of this game will easily allow players to slip in and out.
That being said - if there is any type of encounter you guys have been dying to try or anything, let me know and I'll put something together for later in the adventure. That's what I love about this game, that the encounters don't really have to mesh well together at all, and it's still playable.
-IG