I agree with Cecily on this one. The mask is quite easy to get since the Thick Banded Belt is almost always camped. Just sneak/hide your way to it. Here are some tips:
Do a /who gukbottom all and ask someone to do a CC for you. If someone is camping ass/sup, send them a /tell to see if anyone else is after the mask. If not then come on down!
Grab a SoW before you head into uguk, even if you have to tip for it. The increase in move speed for sneak/hide with SoW is quite large.
While sneaking, strafing is MUCH faster than running forward. (In this case, when I say strafe I mean going directly sideways, not diagonally forward). Use this to your advantage!
Also, here are some directions if you aren't feeling adventurous to find out yourself
[You must be logged in to view images. Log in or Register.] Remember, sneak/hide the whole way if you are low enough to grab aggro!
From UGuk:
Run down ramp, make a right into the room with the plank over the water. Go into the water and follow water until you see land with spiders. Go onto the land and follow the passageways until you see a room with a doorway guarded by a couple of frogs. Go into that room and follow the path downstairs until you see a room with two water pillars and a tub in the middle. There is a open doorway on the left side of that room, go into that doorway and follow the path down. Keep Right and pass the room with the frogs inside the cubbys. This will lead you down a ramp/corridor where you will come out to some spires with small wooden plank/bridges. Cross the first plank and hang right to cross another plank. Then follow that corridor keeping the wall to your right. Eventually you will hit a room with a passageway on the righthand side. That is the zone into LGuk undead side.
From LGuk undead side entrance:
Follow the passageway down the ramp until you hit a small "river". Jump in the "river" and swim right. You need to swim down and back up. When you pop up, go to the left side, this will put you in the Bedroom area. Take the left most corridor, this will take you to the bats area. Again, take the left most corridor and this will take you pass the ice skeletons. Follow that corridor and it will lead you to an open room with 2 frogs on the side of the entryway. As you enter the room you will notice gargoyles to your right and wizard frogs to your left. Just go straight into the hallway with the ladder. Once you enter the hallway, it will force you to turn left. Turn left and go straight... it will dead end into a wall with a ladder on it. That ladder leads you to ass/sup camp!
Good luck!