O.k. update on this.  I talked to my Dad this weekend and asked him what he wanted for Christmas.  I mentioned his standard wool socks and his reply was "I have lots of wool socks."  Guess I've filled that need for a while. 
 
So, being the good daughter that I am, I then asked what he did want for Christmas.  His answer?  "Surprise me." 
So, I'm now officially desperate for ideas.  While I like the idea of buying him a hunting trip, that runs into some serious money, plus he is picky about his trips.  I'd rather buy him a neat gadget or something.  He also likes books about the outdoors and hunting. 
I'm hoping someone has a good recommendation for me. 
GSG