Hey Brandy!
I may do the Cinderella next year too (we came from the Bay Area 5 year ago so this is a ride I've done before) If you are looking for a ride in January, there's a ride in Palm Springs too, unless you just wanted to hop over to visit the in-lawsSometimes you just have to sign up for something because then, there it is.... calling you get ready for it!
I am not that comfortable doing really long training rides by myself in my area (roads aren't great) so I use the organized rides to get those in (plus, I have the SAG support in case something goes wrong or I've overextended myself). You could also look at the Cool Breeze Century out of Ventura in August. They have several different mileage choices and from what I understand it is a fabulous ride!
I know what ya mean about the decents, I'm not too great at them but I am improving.I did one this weekend that scared me to death... but I did it and that's what will help me improve!
Have you looked at the ride calenders to see what other rides are happening down in SoCal?
Tracy