The ideal kit includes everything I might need. The opposite of how much gear can I take is how little gear can I get by with. Perhaps it's a function of my aging knees and back, but I find myself brainstorming about the least amount of gear I can take with me and still be productive. Obviously I need a camera and lens, a battery and a memory card, but what else is absolutely necessary in order for me to be successful with the kind of photography I do?