I had Viglar quite obviously the leader, and it was clear he was drinking heavily. When he was knocked out by our Mirkwood Elf, he ended up dumping out his wine flask (almost did so on his unconscious body). The PCs then rescued the captives and loosely tied up the slavers (enough to slow them down when they awaken). Most certainly humiliating for the Viglundings, especially Viglar, since they outnumbered the three Elves who demolished them by 2 to 1.
