Bring your kids, bring your dogs. This has a small playground for little ones, and also one of the best dog parks for 10 miles around. Bringing a dog is not required, though. Or a kid.
Swap trackables, GC codes of nearby cache types to fulfill the souvenir requirement, etc. It's the last day. Help each other out.
Directions if you are GPSr-challenged: If you are using the 210 freeway, exit at Madre St. Turn north. At the second traffic light, turn left on Orange Grove. There is a parking lot and also street parking. Not to mention, if you are a premium member, a traditional cache right on site.