Andy - again, the choice is yours. I don't think a couple of ounces makes that big a difference for your use. However, to me the key word is "probably". You "probably" won't be building an emergency shelter, etc. In terms of being prepared for unforseen events, you should allow for possible situations. Many folks have found themselves in precarious situations close to home or camp.
ANY knife is better than NO knife; I personally opt for a larger blade such as my BattleRat or Fallkniven Thor when I am out in my "south forty", and I only own 165 acres. To each his own I guess. Tom <img src="/ubbthreads/images/graemlins/thumbup.gif" alt="" />