Here's an outline of the caves. I'm trying to figure out how to represent the bulk of the island (by the way, it's an island) while still keeping the map easy to read. So far I've just got different shades (in the previous sketch) showing the height of the external geography. There's a few spots where the caves intersect the cliff faces; a couple are cave entrances, but some of them are just fissures (good for getting some airflow and keeping the place from getting too ripe) and making that all work will be the next step.

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Sorry about the numbers, they're just there because I was working from an already-written adventure and needed to make sure I was getting all the keyed locations in.

cheers,
Meshon