DM Note: The way we played this was to let all the party members move into the lair, given that they all were essentially charging in blind, and then letting the players hold any further actions until the initial wave of kobold's could then be placed on the map.
A further inspection of the underground cavern hinted that this might have been a temple at some point, with the rear portion of the cavern sporting a large raised dais. There were no further religious symbols found though, including any of Orcus, In the northeast corner of the cavern the obvious home of the large goblin was found. A locked chest sits in this area.
Among the bodies inside the lair you find:
15 kobold minions, each with hide armor, a small shield, a spear, and three javelins.
5 kobold skirmishers, each with hide armor, a small shield, and a spear.
3 kobold dragonshields, each with scale armor, a heavy shield (made of a dragon's scale), and a short sword.
1 kobold wyrmpriest, with black hide armor, a spear, and a bone mask (shaped like a dragons head).
1 large goblin
sporting a rams head tattoo and a single large iron tusk, with chainmail, two battle axes, and a pouch with a silver key.
The fact that this encounter turned out to be quite difficult forced the players to review their skills and powers, especially those who could affect healing in themselves and others.