Great! Thanks for the help!
See, here's my idea for now
I will place several of these 'special' Goblins in the adventure... Salting them in with the regular population, but showing more dominance and intelligence...
Maybe, if things work out, the One that's waiting in the deepest chamber of the adventure, has like 4 or 5 Fighter levels... and he actually fights his way through, trying to just get away... and do a little damage along the way!
Don't get me wrong, theres much, much more Demonic elements to come in the plot... but an NPC that gets away can come back to haunt the characters later... here's the really sneaky part. He gets experience and gains levels too!
I think I see some good plot stuff forming here... any suggestions?