I want to buy a reflector, but I am not sure about the size. I want it to be big enough for me to shoot some family pictures, but small enough to put it in my camera bag. I went to a local store, checked out one of those 5 in 1 reflector kits, the 22" kit seemed to be a good choice for me. Since I'd never used a reflector before, is 22" reflector big enough for some casual shoots?