Just depends upon what your goal is I guess. There is a man named Tim Ernst in Arkansas that shoots stills of the Ozark Mountains and Buffalo River region. He is quite good at his task. But when he goes hiking I would imagine he goes to take picures. Lugging gear goes with the task. But many people go hiking for the enjoyment of hiking and being with people and maybe with a goal of getting a good shot here and there. They do not want or need to lug 80 pounds of gear. But as I said before, taking a single lens will force one to think harder about the elements that go to make a good photo. Even if it is to say, "Well, that didn't work."
Still you wanna turn loose of a 4x5?
Can you send an equipment list and a list of other items it does not include (just necessities)?
On the mold and mildew issue. There is something called Tea Tree extract that is used to kill mold. I have never tired it but it is highly recommended. It is suppose to smell really bad.