Hi all,
thanks for all the responses. I can see that there are times when a big thin blade such as some have mentioned would be very useful. But not for me. I live in Blue Mountains National Park, where minimal impact camping is essential, thus a huge blade would be less at home. Thus for the more environmentally friendly tasks such as spoon carving and featherstick making etc, a smaller blade suits me well.
My original question was about the usefulness of a 9 inch blade (bowie) AND a hatchet AND a slipjoint. It seemed to me that the hatchet made the large knife superfluous- just more weight to carry. BTW, I am talking about for overnighters, which were mentioned in the forums I encountered.