Have you ever considered hydration on your back? I've never dropped a bottle, but when I'm really working hard I don't really want to change my position. The last race I did I started thinking about one of those camelback jerseys with room for a hydration bladder. Have to admit I'm still out on this one because... it looks so ugly... 
Just a suggestion, but I guess 10 days before a race is not a good time to try out something new.
Winter riding is much less about badassery and much more about bundle-uppery. - malkin
1995 Kona Cinder Cone commuterFrankenbike/Selle Italia SLR Lady Gel Flow
2008 white Nakamura Summit Custom mtb/Terry Falcon X
2000 Schwinn Fastback Comp road bike/Specialized Jett