Embedding audio clips into webpages turns out to be a bit of a minefield. Please let me know if you are having problems listening to the clips and I will try to improve the links. You will need to solve the clues before venturing out into the field.
The cache itself is small, though has room for little more than the log and a pencil. It may just take the very smallest trackables. There is a "Geocaching Rocks" badge as FTF prize.