Ahhh, the camelback--looks like you hit a spot . Do what works, don't worry what anyone thinks...but, learning to drink from a bottle is a good skill to have. Don't give up, yet. There's a thread all about it. It gets easier.

I don't know enough about positoning on the bike to give advice, but it sounds like something's off. Is your saddle too high? Are you riding clipless? Could be your cleat position. Could be a lot of things, I guess. I'd start with the saddle. It's always the saddle. Oh, and you'll soon discover the quest for the perfect one is not unlike Ponce de León's search for the fountain of youth. You will look far and wide, and measuring devices will be implemented .

Glad you had such a great ride! Your time sounds fast. Looks like you're in this for the long haul. Welcome to the club!