Ditto to all the other responses, boy can I relate! When in the park I tend to keep it light. I have a little WJ pocket vest I believe it is called. It has a zinger for forceps & nippers, and plastic bags inside that I use for indicators, split shots, some nymphs and such. It also has an attached fly patch, mesh pocket for tippet and such and folds down to provide a small work surface. It is on a neck cord so all I have to do in the summer when wet wading is rig my rod, put on my boots or sandals, and grab the pocket vest. It's so much easier than getting completley rigs up with a full vest and I have yet to lack anything I needed when using it.
"Fly-fishing has many attributes, but none more pleasing than it's ability to liberate the young boy that still hides within me and to let that boy live again without embarrassment or regret, sorrow or anguish." Harry Middleton