This should be an easy find. There's no reason to step off the parking lot pavement or cross any of the fences, dig through any plants, poke at any rocks, etc. Kid-friendly and wheelchair accessible. The nearby park HQ building is well-stocked with maps, water bottles, t-shirts and various other knicknacks. It's also where you'll need to cough up five bucks if you're going into the park from here but you shouldn't need to pay if you're just here for this cache.
You'll need to be stealthy if there are people around, of course, but most times it shouldn't be difficult to retrieve without drawing a lot of attention. Hopefully this is the last micro you ever encounter in this nice big park! :)
There is only room for tiny trade items. The cache started with three polymer tokens and a Rite-in-the-rain logsheet. You'll need to bring your own pen.
The drive to the park is on narrow, twisty mountain roads (which I love) so please drive safely.
Web page for the headquarters/visitor center: http://www.coepark.org/vcenter.html