I'm not much help on that I'm afraid. Once tried to ride my motorcycle to the park up there, and had to turn around once I got to the entrance because I was freezing. Couldn't help thinking, I moved to Hawaii to be cold and wet? Fled back to Bears for a Kona coffee. Phil used to make that as a house coffee one day a week back in the day. I don't think the new owner does that. I hear that Acros is better for night shooting, and I've only shot at night once. It came out well using Arista EDU Ultra 100. Tri-X should do as well or better. But w/ 4x5 you want to make sure you nail it due to the film's expense and having to schlep all that weight up there. It's Thursday, so why not shoot some tonight at different settings and see what you get before heading up there on the weekend?