Dusty, Steffie, Tom, Terry and others behind the Big Bear Bronco Bash have grouped the trail runs by difficulty and come up with combos that would be a normal day out on the trails for a moderate sized group. They've been doing this event for 6 years now, and two of the So CA Brethen are Big Bear locals. I believe they've got a pretty good handle on the trails. Those combo's & descriptions can be found here:
http://www.dustyland.net/socalbroncos/bbbb/trails.html
Maybe this will be some help if you are still pondering the options.
No. 9 is a particularly important run to me. I was there for the dedication, & just typing about it brings back the emotion of the day.