Whelp, I was perusing the WoC forums, and it looks like* the official stance is that I cannot deal the extra Hunter's Quarry damage to each Quarry that I hit - I don't think that's what the book says, but if that's the official stance, I guess I'm willing to settle for it.
HOWEVER, Kevin The Rule Lawyer failed to point out that Battlefield Experience grands a +1 to hit on ANY attack roll - even those that don't come from me. So all my allies get +1 to hit when they're attacking one of my 3 quarries. That placates me a little.
* I say looks like because I never actually saw an official stating that, I only saw people saying stuff to the effect of "I seem to remember someone important saying ..."

