Lightest Tripod for Pentax 6x7

I'm hitting the road in the Spring, backpacking, and am considering
using my Pentax 6x7 exclusively.

What do think is the lightest tripod I can get away with using slow
speeds?
Though I use mirror lockup, the focal plane shutter makes a serious
thrust and
speeds lower than 1/60 show it. Hand dampering the camera helps, but
even that gets risky the slower you go.

I've been using my heavier Berlbach with a sizable Bogen head around
home areas, as my lighter Bogen made for some very unsharp tests, but
I can't see
taking it on a long backpacking tourism trip.

Thanks, Ken Smith