Yes, as Vik says it was certainly an experience! He’d done a few big week-long stage races before, and some epic non-competitive riding, and I’d done nothing of the sort…
I think 2 of the stages took me 6-7 hours each, another couple were 8-9 hours, and the others were 10-12 hours. Even with the early starts, some days you’ll not be doing much other than waking up, packing away tent and kit, eating breakfast, riding, eating dinner, putting up tent and sleeping. Having said that, you’re quite a lot faster than I am!
It’s brutal, some of the days we did 4000m of ascending, but the riding and scenery are worth it. The IB website should have the roadbooks from previous years somewhere, which will show rough route profiles (although they don’t show all the little wrinkles, so height gain/loss is underestimated a bit).
You’re welcome to email me (in profile) for more info, I can copy in Vik as well.
Briefly, you’ll need to like climbing for an hour or two at a time, two or three times a day.
Find a technique for carrying the bike that you can get on with for 10 mins at a time, and practice that.
And eat all your pasta before you go away, as you’ll be eating it breakfast noon and night for a week, so you won’t want any for a while when you return :-)
Best of luck, I want to do it again some day, maybe I’ll be there in 2011 too!