I like my fluids on the hill but have never used a camel bak or similar. I have seen Japanese skiers using the Salomon waist belt with bottle on the hip at a 45 degree angle like a "Hydro 45". I have also considered the Ultimate Direction products developed primarily for runners like the "PD Adventure vest" possibly leaving the bottles off or moving them to the back of the vest. I like the idea of light weight, low bulk ie minimalist approach to hydration. I think you would need to wear a jacket of the vest if it was cold.
Has anyone got experience with these product or similiar?