I'm strictly a roadie & always use my Camelbak (100oz classic model) for anything over 10-15 miles, which means virtually always (doesn't mean I always fill it all the way). My back gets a little sweaty, but that doesn't bother me. I find it much easier to drink out of a camelbak than a bottle. It also keeps the drink much cooler than a bottle. Not to mention that I'd need multiple bottles to duplicate the capacity. The classic has limited xtra storage, but enough for a cell phone & wallet. It does have some elastic a jacket could be stored in also.
I typically carry dilute gatorade in mine. I just rinse it in hot water when I'm done & hang it on one of those hangers that keep the bladder open to air; takes a few minutes. No taste or smell issues here.