We're doing a Russian River cruise in Sept. I want to bring as few lenses as possible. We'll be seeing river landscapes, museums & churches etc., as well as general street scenes. I'm looking for lens recommendations, as well as which lens(es) to use in which situations. I have an OMD EM5, along with various lenses: 12-50 kit lens (f3.5-6.3) 12-35, f2.8 15, (body cap lens) 17, 1.8 25, 1.4 75, 1.8 75-300 4.8-6.7 I've been told the 40-150, 4.0-5.6 might be a good one to have. Any help will be greatly appreciated!!