Thanks for the info. I think I will try the film at rated speed. I have read some threads on forums suggesting maybe to rate it a bit lower. I will have to see how the results come out.
Evidently fuji claim improved latitude over the previous generation, how accurate that is, we shall find out shortly! I will use the film 7 for this one, and based on previous shootings with it, I am pretty happy with the exposure metering wise. I had heard porta was possible less forgiving and more prone to muddy shadows in some situations, I have no idea as I have never used that either! The forecast is mostly sunny for sunday where I am going, so most likely I will use a bit of fill in flash if we are outdoors.
The only time I really noticed underexposure on neg film, was when I got into the habit of doing my KM5d, bashing the AF point near to highlights for WA shots. It worked pretty well, but it's not a good idea on neg film. True the roll I mashed up did produce usable images, problem was my low ISO film, ended up looking like high ISO 800 stuff