Really depends on the kind of trip for me - when I headed 'down under' for two months, I took an E-M1, the )12-40, the 50-200 SWD for telephoto, and the A7r, FE 16-35 and FE 55 for all the land-based shooting. Plus an RX100 and scuba housing because, well, great barrier reef. If I had to do it...