Hey everyone, This is my first post here and I certainly appreciate and words of wisdom. I am a Canon shooter and I have already made the determination to carry around my heavier gear for the duration of my trip. I will use my 100-400 for Animal Kingdom on either my 5d2 or my 7D. I also have a 70-200 2.8 (non-IS) which may spend most of it's time in the bag in the hotel room. I will of course have my 50 1.8 around for any lower light situations and it's silly lightweight. My question really revolves around my general "walk around" lens in the various situations. I currently have a 24-70 2.8 (non-IS) and I have just recently picked up a 24-105 f/4 IS for general purpose. I am thinking about selling the 24-70 (I know, it's heresy) to recoup some dollars as I generally don't find myself shooting at 2.8 on the "wide-r" side of things, and of course the optics of the 24-105 are solid. I am really just looking for some folks who may have used both in Disney, to shoot EVERYTHING - both family shots outside and inside and landscape/architecture, etc. I know that for fireworks at the Magic Kingdom and Epcot I'll be fine with either lens and I also have a Sigma 15mm f/2.8 fisheye that I will use for some of the really wide stuff like Spaceship Earth and interior ceilings and such. Do you guys think I should keep the 24-70 2.8 or let it go? Will there be a need for me to have 2.8 at 24-70 outside of what my other lenses can do (i.e. 50 1.8 or 15mm)? Thanks so much for the input!