Our youngest was 4 the last time we went, and now is 9 so we won't need a stroller and all the junk that comes with taking a young one. So I want to downsize what we lug through the parks. I think I want to take my 5D body and two lenses. I'm thinking about the 70-200 2.8 and the 50mm 1.4 (even though the 70-200 is SO heavy!) lol. I want fast lenses that will cover indoor low light situations, tight shots, and zoom without taking everything I own. So what lenses would you haul around the park?