Yesterday, two of our players couldn't make it so we said their characters were staying in town while the rest explored Dwimmermount again. They were 2 clerics, a fighter, a retainer, 2 animal trainers, some ponies, some hunting and tracking dogs, some birds, and some war dogs too. They quickly found some stairs leading down to the 2nd level of Dwimmermount and encountered some hobgoblins after fighting their way past the guards.
The hobgoblins looked at the size of this party and quickly left, leaving behind their bag of loot in order to discourage the party from hunting them down. This worked and there were some interesting moral quandaries as the party discussed if the they should hunt down the hobgoblins before the hobgoblins came back in bigger numbers. They really missed the other two players as their characters are more gung-ho about taking out any obstacles to their dreams of power and riches. Anyway, they decided to let the hobgoblins be and so some more exploring.
They were prepared for most anything so took out some Shadows, some wood golems, and some hell hounds with only some minor wounds. Then they encountered the zombies. They took out the first batch fine but then they found the Zombie Lord and a war dog died and a character took permanent damage as he fell. He now has a messed up knee and can only carry half the weight he normally could. After grabbing the treasure, they decided to head back to town before anything else bad happened and miraculously avoided almost all random encounters.
The one random encounter they did have was a rival adventuring party, which was Typhon's Fist, the party they stole the map from at the beginning of this campaign. The thief was not with the party today so Typhon's Fist did not recognize them but I've leveled up the characters of Typhon's Fist and they will be yet another thing to deal with in Dwimmermount.