The cache is a small container with room for very small trade items. There is no pencil, so bring your own.
The terrain is dirt trails, prairie grasses, hills, and rocks. The area is quite varied and pretty impressive. The area of the Watertower Cliffs cache, GC1MJ7R, is a great example of the extreme variation out on the prairie.
There are several more caches out on the prairie, most of which require leaving the trail for +/- 100 feet.
The cache might not be available during the winter due to snow.