KSH, have you tried the insulated bottles by Polar? If you fill them full of ice and then your water/sports drink it will stay cold for a long time (over an hour)...even in 90+ degree heat. If you freeze them they will stay cold even longer. I HIGHLY recommend them. I too am not a fan of warm drinks...won't drink them unless absolutely necessary...yuk! Long unsupported rides do call for a Camelbak unless there are convenience stores along the way.

I like hydration packs for mtn biking but prefer bottles on the road. For me, having a pack strapped to my back while riding on hot pavement makes me feel even hotter. I need the air circulating around me. Whatever works for you is what you should use though.