wide, standard, telephoto and maybe 2 bodies should be about all you need. Don't go overboard. Less is more. I go with a couple small Leicas, 21, 28, 35 and 50mm. I'd use the 28mm 90% of the time though, so I could use to get rid of a couple of lenses. If I travelled with one camera and the 28mm, I would be more than happy.