I would have to agree with Curval.
Fish are a fairly self-renewing food resource and I remember hearing that water is a natural radiation barrier.
Curval's two fish hooks could sustain him and his family until he figured out how to make new hooks with the bones of the fish he caught. New fishing line could be made with the fibres of local plants.
2 Cases of ammo (assuming you meant 2-50 round boxes) could feed you, assuming you and your family ate wild game every 3 days and were a perfect shot, for 300 days or so.
The gerber is a good idea.
Other than that, a chunk of flint to light fires for cooking and boiling water to drink would be a good idea.
In your Ripsnort doomsday survival kit you would also want to keep some hemp seeds. Easy to weave the fibres and the clothing you make would outlast untanned animal skins. You wouldnt have to worry about contaminated soil, you would be wearing it, not eating it...but you could if things got rough enough.
Oh yeah, and an ugly dog, a sawed off double barrelled shotgun, a music box to give to any crazy kids,,,,, and of course...the last of the V-8 Interceptors.
