bmrider
how old is the pack? I have noticed that new packs take a while to get to know them and how to adjust them, new waist belts are always a bit slick and slide down and after a few trips the wasit band sort of shapes to your body. Imagine when my spectra pack was new... I really hated the waist band, spectra is almost as slick as teflon, now it hugs my hips.

Cold tootsies means inadequate footwear. extra large booties with thick socks helps that.
Jim