My travel kit depends on if I'm going to bring my DSLR or not. Depending on what I'm doing or my goal is depends on what bag I bring. Big Domke or Domke Satchel.
If I'm bringing the DSLR it's big domke, 2 Zoom lenses, 2 M bodies and 3 M lenses. A brick of film and I'm golden. It's not heavy, or bulky and covers all my basis.
No DSLR Means the satchel, which means 2 M's, 3 Lenses, Film, flash, meter etc. Super Light, versitile, and I leave it at that.
No need to make it complicated or heavy.