Derulbaskul
Adventurer
You may also like to check the 2E Dragonlance product, Dwarven Kingdoms of Krynn. It has a large dwarven fortress built in a volcano and mapped using dungeon geomorphs. It's fairly large already but by adding in more geomorphs you could make it humungous in short order. Try svgames.com. Plus the presence of a volcano may add to the atmosphere, particularly as you also plan on running part of the adventure in the Abyss.
And you could always use the four dwarven citadel maps from the WOTC site referred to above as the gatehouse.
Cheers
NPP
And you could always use the four dwarven citadel maps from the WOTC site referred to above as the gatehouse.
Cheers
NPP