I placed this cache on a very nice early summer evening while my wife and our puppy dog played on the small beach near GZ. You may encounter snakes, since you are near water. I also scared a large armadillo as I crossed the island. Actually, he scared me. It makes me wonder, do armadillo's swim? Apparently so.
You will be looking for a big ol' ammo can. It has lots of room for trade items, McToys for the kids, and trackables. Remember the cachers' code - if you take something, leave something of equal or greater value.
The canopy is rather thick in here during summer months, so your gps accuracy may not be great. Once you get close, use your geo-eyeballs. Enjoy your day at the Sardis Lower lake.