The Flexbody is so light, the small bag I keep it in feels the heaviest of the two weighes, sans back.
It does have a bit of length but I am sure that if I were traveling, it'll be in my kit.
I can no see and bear the thought of missing the best possibility for a top shot, just because I left the best tool I have to accomplish the job was left behind.
Of course, in my decrepitude, I travel very heavy with the Hasselblad system, on most trips of more than thirty miles from Charlotte Center.
Traveling light in MF to me, would include just my Minolta Autocord, or two Super Ikontas, 6x6cm and 6x9cm, maybe my multiformat pinhole Zero Image camera.
Otherwise it's 35mm and I'm thinking of adding some of my point and shoots, AF or otherwise, to it's own kit of cameras for expired colour and b&w films.
The Flexbody is just too good an option to leave behind, period, in my opinion.
Cheers