Grizzly Guides is a small show with Chip 'n Dale and a park ranger CM in the ampitheater in the Challenge Trail. It lasts about 10 minutes. Good little show...glorified Meet 'n Greet, really. I don't recall them being on any schedule, so you'll just have to listen for an announcement when you are in the area. Autographs with Chip 'n Dale afterwards.
We didn't catch Legend Keepers, so I'm not sure what it's all about.