Fleshing out Castle Greyhawk in EttRoCG

[El Bob]

I've been working my campaign towards the "Expedition to Castle Greyhawk," and we are getting close to beginning the adventure. Because the module only fleshes out certain levels of the dungeon, one thing I've been thinking about is having something on hand to fill in some of the pertinent empty levels (right now I'm looking at levels 2 and 3 of the Tower of War). Does anyone have any ideas for products that might help with this?

I just got the PDF of "Greyhawk Ruins," and I like some of the stuff of Zagig's Tower. However, most of the stuff for the Tower of War won't work. I've been thinking about grabbing "Castle Whiterock," but it's a little pricey to grab without seeing it.

Does anyone have any input? Will I be able to loot layers out of "Whiterock"? Does anyone have any other suggestions of good sources to find dungeon levels to substitute for the missing Castle Greyhawk levels (the more specific the better!)?

 

[El Bob]

Let me phrase my question a little differently -- are Whiterock's levels set up so that they are generic enough to be used as filler in other dungeons? Does anyone know of any other supplements that might fit this bill?

 

[Gansk]

I have only skimmed Castle Whiterock so far, but I'm pretty sure the levels are extractable.

 

[El Bob]

Just out of curiosity, do you like what you've seen so far?