It's amazing, the small rural areas you can find near busy stores. In this instance you'll find a small but noisy "Signal" chirping pond. From the parking area I would suggest going left for a shorter walk. However, either way, left or right, will get you to the GZ. The grass walking path seems to be maintained regularly. No bushwacking required.
I wouldn't expect this to be a quick park and grab. A bison is what you're looking for. However, I wouldn't reach in to find it. Instead, look for a very thin tether not too far off the ground. No tools, like a gig, are required for this cache.
Although I've never had the opportunity to go gigging, I'd love to try it with an experienced guide. From what I hear frog legs are an amazing feast!