I have so much camera gear now that I have to choose...

If I travel by car, I'm likely to take 5x7" and 18x24cm cameras, and throw in a MF folder for good measure. Unless I'm planning to shoot for enlarging; in which case I'll take 4x5" and 5x7". And an MF...

If I don't take the car, the Bronica will get an airing - ETRS with 40, 75 and 150mm lenses. And since it's so heavy already I throw in the 35mm Bess-L too, and a "backup" MF - likely the Zeiss-Ikon Ikonta 621.

If I bring my wife, she brings the 35mm outfit: Pentax Mz-5n with a couple of lenses. And since there's someone to help me carry (I hope), I might bring another size LF too...