[Faceman]

Yip,

Umber Hulks can be a pain in the posterior first time through SoA. They're pretty strong and cast that ugly Confusion spell.
To avoid them make the dog meat stew and have an invisible (Potion, Hide in Shadows, Invis spell) or sanctuaried (cleric spell) party member take it to the left - close the door - tadaa.
To kill them easily: Cloudkill into the room and close the door.
To kill them in man to man combat - buff up your party (Bless, Chant, ...) have the tanks wear Charm protection items and be sure the mages have no serious weapon so they can't do too much damage if they decide to attack the party.
spoiler on dog stew
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(kill the dogs outside and make the stew in the kitchen)