Camelbaks are _way_ easier for MTBing. (I was out on my MTB a while ago for the first time in a million years, and some kid says "Why do you carry that bottle when it gets all muddy?" Good point...So when I switched to RB, I still wore the CB for a long time. (Plus, I was used to running trails with a 100oz bladder!!) I actually was so proud to break the CB habit and switch to just bottles. So my frame is small, too, and I can only fit one bottle, but since I'm doing randonneuring and have to have a rack and trunk and all that- once you get used to having it- it's hard to leave it behind. So there I am now with my one bottle, and one or two bottles of something else in the small trunk. BUT on my June and July 200ks I was so worried about heat and how far the stores were going to be apart (June was over 100F) I used my CB, too. Good thing- I would have ran out in June- it was so hot.

That's true- CBs do keep you cooler as long as what's inside is cool!

Nanci