Just remember that 160 is the softer of the two films, and flora,fauna,and rocks might look a little bland. It's more a portrait film giving gentle skintones. Portra 400 will have more spunk and obviously allow faster shutter speeds. Please excuse all my complicated explanations in the foregoing posts - but it might become useful in the long run to someone. Like I said, I'd just buy a slightly warm sky
filter and leave it on the whole time to both protect the lens and correct a little for excess blue
at high altitude or along the beach. Use whatever metering technique you are most comfortable with, including in-camera metering. Switching meters takes practice to perfect, and a vacation is
generally not the right time for that kind of distraction! Above all, have a fun and safe trip!