I don't understand the need to leave anything at home... you can't take pictures with no camera. If you come across a great slide/color/b&W opportunity and don't have a camera loaded appropriately... well...

I too am vacationing soon, taking a Nikon F6, F100, F3, D600, D7000, Pronea 6i, and maybe my Rolleicord. If they sit in the car or hotel, so what?