If I don't just throw a flybox in a shirt pocket, I either use a chest pack of fanny pack. I find that vest's are just too hot, and when loaded, I don't like the excess weight on my shoulders. I use the chest pack if I know I'll be taking lots of pictures and I can clip my camera strap to the chest pack and have it handy for use. But, in general, I use a lanyard for my tools and the chest pack interfers with it.
My posts are worthless without pictures