This cache is near the Guindani Trail, which officially starts in Kartchner Caverns State Park. The cache itself is located outside of the park. It is easy to get to from the park. Just park at the trailhead and take the trail until you are about 150 feet past the gate. Your GPS should point the way from there.
It is a bit difficult to get to without going through the park, but can be done if you do a fair amount of bushwacking.
There is a $7 fee for park access, unless you take a cave tour. The tours are great, I recommend them. I also recommend the hike up the Guindani Trail, which is a loop trail that takes you through a wash and up to a saddle before traversing the hillside and down a ridge to complete the loop. It is about 5 miles long.
I did not have a writing utensil with me, so please bring your own.