Yeah, ain't gonna happen in unfamiliar short-hike (local territory). Camera, say 3 lenses (90, 150, 300), CF tripod, 4 film holders min., pack itself, a few filters and holder, dark cloth, and a few bits. Take the camera off the tripod and put it in the pack. That's about as light as I can get. Now add in water, some rations, a small med kit, compass, extra socks, etc and you have a 20 pound pack.

You might be happy once with an ultralight pack for LF but it won't be a regular thing.

Heck, even when I'm in a local state park, I take more than that just because you never know.

Like someone up here said a while back "film is cheap, life is short".