For folks living near, traveling over and around large bodies of water...There are some relatively small lifeboat fishing kits on the market. The good ones are USCG approved. They would be overkill for a PSK, but, you had mentioned a larger kit you were considering also. I know that DATREX, makers of a lot of survival gear for marine use has a Lifeboat fishing kit. As I mentioned, it's more than you'd want for PSK, but, would be reasonable for a larger kit, BOB, etc. You can see a picture of it at:

http://www.datrex.com/products/viewproduct.asp?pr=16&ca=3

They also produce an assortment of survival rations, water, flares, etc. I don't know if you can actually buy from them direct, I have bought their gear at a marine supply place near me, and seen them on various web sites.

Personally, I have a subset of the Datrex Lifeboat kit in my BOB, and only a really minimal combination of hooks and some line in my PSK. Something to consider is that lifeboat survival kits are generally set up for salt water use. If you're not floating on the "big blue wet thing" <img src="/images/graemlins/grin.gif" alt="" />, but stranded inland with only lakes and streams around, you'll want much smaller tackle than the kit I referred to.