Originally Posted by
Bandera
A backpack can be pure misery after a short while.
The OP wrote he plans on attaching a rack and puttng a backpack on "it," i.e., on the rack, not his back.
OP: Make sure yoy have sufficient low gearing. Even 13 lbs. will feel like something, especially on hills. A trailer would not be my first choice with so little weight. For example, the B.O.B. with dry bag is 18 lbs. alone. If you go with racks and panniers, make sure you have enough heel clearence. Shorter chainstays combined with big feet increase the potential.