I've driven by this area dozens of times, and each time I've thought what a great place this would be to hide a cache. Once I got down there on foot, it was a bit trickier than originally planned.
You are looking for a camouflage easter egg with a small treasure inside. No space for a pen, so you'll need to bring your own. Ground is a bit marshy so you will need to wear boots.
Update: Thanks you to DancerMan for replacing the mangled cache. The cache is no longer in an easter egg but still in the right location. There is no room for tradeables.