with a large format camera everything is separate .. film holders, meter, filters, meter, dark cloth, sand bag &c. if the film was installed in the camera ( roll film adapter ) and you
were sunny-16-ing all your exposures and used a kalart rangefinder specifically calibrated for your lens, then i would still say bringing a lens on a lensboard is minimal to bring.
a lot of people use roll film and a range finder. with linhof cameras some say the rangefinder focuses more precisely than the eye on the ground glass, and roll film,I can understand the advantages for folding if I were to use roll film and a rangefinder but for my intentions, the folding requirement which I had previously imposed on myself seems maybe unnecessary for the 4x5 format.
why not there are more choices for lenses, from old and brass to new and sharp to magnifying glasses even, much more fun to use roll film and a not so boring lens ..