Potential gear probably deserves its own thread, and you'll elicit just about as many opinions as there are fromats and models of cameras out there. But in principle, as general advice, I'd say forget
all those fancy camera daypacks and their heavy rubber packing. Learn to use simple lightwt bubble
packing and plastic bags, or spare clothing as padding. Only take what lenses and gear you really need, and already intuitively use. When you're tired and a storm is closing in, you need to do things
instinctively. The less bells and whistles a camera has, and the less battery-dependent, the better.
Some things that are wonderful in the studio can fail in the weather. Unless you are doing strictly
handheld work, get a solid tripod, but no heavier than necessary. A flimsy one or wobbly ballhead doesn't realistically save any weight if your pictures are blurred! Expect things eventually get dinged
up, no matter how careful you are. Never put your own safety in jeopardy just to get a shot. Squalls
and lightning won't wait for you. Always have a decent parka and sweater, even if you're out for a
dayhike in potentially cold or wet areas. Talk to the locals or travel with an experienced individual if
you're not experienced yourself. Camping gear itself is a bit involved and off-topic, but there are plenty of websites dedicated to that subject.