I always wear a Camelbak on all long rides now. It has a 70 oz capacity. I experienced something similar to you on an organized ride once and swore I would never run out again.
Of course- just last weekend I attempted an overnight bike tour with a friend and even tho I was well-prepared, I wasn't prepared for the 8 mile detour and having to walk our bikes for 3 miles. I rationed... but it was tough. I would have done just what you did!
Sorry you had such a rough go at it. I'm sure your night in the musty room didn't help much...



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