You could get a decent 6x6 folder, something with a coupled RF.
I used an Iskra as my main & sometimes only travel camera while living in Europe. Decent sized negatives in a package that is smaller than many 35mm SLRs.
Or, something more modern like one of the Fuji 645 cameras?
The only bit of new gear I'm allowing myself on this are a carbon-fiber tripod and a good ballhead. My current tripod weighs about 7 lbs (seriously, it's a freakin beast).