You should enter the cave after you've been through all of the crypts. You'll need to go and give someone a right good drubbing (as you will be requested to do).
As for the difficulty, it is a bit different from BG say, but missile weapons are the key. My finest piece of advice would be to look at my sig. There's no shame in running off and smacking them later.
Try using one character to draw the crawlers out and have all of the others ready with missile weapons. Being able to pause on the Inventory screen means you can safely switch back to mêlée weapons whenever you like. Which is nice. Move back and set up the attack again, and...dead crawler anyone?
Part of the puzzle about the evil that plagues Kuldahar will be discovered at the end of the series of crypts. Don't worry if it doesn't make too much sense so far. There's a long way to go yet
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Making running away an art form
[This message has been edited by Lord Brass (edited 10-16-2001).]