I use mountain cage pedals (I believe mine are MKS touring?) and PowerGrips-- those strap like contraptions. I feel like I get the best of both worlds and only have to bring one pair of shoes. I mostly do off-road touring and hiking is a normal leisure activity.
I see nothing wrong with using clipless pedals/shoes for the same reasoning Staehpj1 mentions-- you're on the bike for great stretches of time. Part of me wants to go clipless but I just haven't done it. I'm off the bike a great deal too....