One suggestion to consider. Have you tried carrying a bow saw blade? They ‘curl’ up quite small in a tin/pan and can be easily used to construct a frame for a bow or even buck saw (how to is in multiple youtube videos and bushcraft books such as Richard Graves or Ray Mears) – which makes those woodland chores so much easier than with a small folding saw.
Other than that, there isn't much that can be done to limit the damage caused by serious exposure to radiation. Some animal studies suggest that pyrroloquinoline quinone (PQQ), an OTC dietary supplement, can have fairly pronounced radioprotective benefits. While the evidence is very preliminary, the substance is believed to be pretty safe, so you can certainly grab some just in case. Another potentially beneficial OTC products along the same lines are diindolylmethane (DIM) and n-acetylcysteine (NAC).
The Ultimate Survival Kit is the perfect upgrade for your survival needs. Built to be durable under the most extreme conditions this bag will hold the contents of any of our survival kits as well as extra clothing and other personal items that you will need in an emergency situation. There are 6 external pockets for easy access to your supplies. The laptop compartment makes this a great daily commuter bag. External straps allow you to strap on extra supplies and gear.