Hi! I am also training for a climbing century in 3 weeks, and I posted a similar question in this thread:

http://forums.teamestrogen.com/showthread.php?t=17300

Just thought I'd give you that heads up so you could see whatever opinions trickle in on that thread...

Our rides sound a little different...my ride sounds like more mountain climbs, and yours sounds like lots of constant hills (which I consider much harder, by the way). But, maybe both our threads will draw some great help for us!