Originally Posted by
wphamilton
I use 2-gallon ziplock bags, if my wife can find them, or smaller if otherwise. I don't see how that can possibly be less effective than a waterproof/resistant carry bag.
Another option is a roll top bag that fits inside the backpack. I have a
Banjo Bros replacement water proof liner that fits inside one of my panniers, but I know they make some for backpacks as well, and they are pretty cheap ($10.)