At the end of this week, I am heading out on a backpacking trip to the Gila National Forest in New Mexico. I'm bringing a few films (Velvia, APX400, PX125, and the 160S), but I have a pretty good idea of how to work with all of them except the 160S. Is that a film I should go for box speed from, or will I get better results at 125 or 100? I know these are matters of taste, but I would appreciate any thoughts anyone has. I usually overexpose my black and white, but I don't shoot much color (and what I do is usually something strange like a cross process or redscale). I also realize that 160S is probably a poorer choice than 160C for landscapes. I actually thought I had 160C in the freezer- apparently I mislabeled it. I guess we'll see what happens with the S.