Any pack with a load shelf should work quite well. Fold up and place the heavy garments on the shelf, between the bag and frame, and cinch down tight. The previously mentioned Sawtooth 45 will work, but I think you could go a lot smaller, with something like a Pop Up 28. The bag is more than ample for food and water, more spare clothes, binos, kill kit etc.
These are both Mystery Ranch packs, but there are plenty of other packs out there suited for the same purpose.
