So they are all captured?
How about doing some on the spot creation of an "old orc ritual" called "the Hunt." It could be religious rite that all captives become the prey in a hunt dedicated to some orcish god or another.
And, if you desire, you can give all the captive daggers, or spears, or some simple weapon, because the "old orc ritual" calls for the prey to have "teeth." Then the set them loose and give them a (very) short head start. Of course, then the entire villiage can get in on the act of capturing the "prey."
Plus, since this would be an orc ritual, you can actually have orcs fighting each other to be the one to catch the "prey," and that can give you an out if the PC's get re-captured too quickly...
Hey, I'm going to have to remember this!