Exact coords degrees, minutes, seconds.
N27 41 51.78362
W80 23 45.12476
This should get you within 1/2 inch.
This by far is no easy cache. I brought 2 GPS units with me. Handheld Garmin and my work GPS. Knowing I can find a dime with it. I tried the Garmim first. Coords jumping around by 30+feet. So I raised my antenna on the work GPS above the tree line and had 1/4 of an inch quality. Your not even going to get that close so no arguments on the coords. You will be looking for a bison tube hidden very well. You can reach GZ by kayak or paddle board. But it's a long way from a launch site. I would not suggest going down the canal with them as the current would be tuff on the way back. Plus the canal is too overgrown to get within 500 feet. If you think you want to drive down the road that runs down the north side, be ready because there is no turnaround. During raining season this place can be underwater as this is one of our main drainage canals for our county. I wish you all the luck. Your going to need it.
Jbhyqa'g or ybj. Naq vg'f abg uvtu.