HT2312 - Photo Vests

For 50 years now I've had an on again, off again relationship with photo vests. I'll go through periods where I find them convenient, comfortable, and adequate, then periods when I find them too limiting. The real issue, obviously, is not the vest but rather the amount of gear I feel is necessary for me to do the work I want to do. That issue always leads me back to gear minimalism, and the search for the least possible gear needed. I'd long for the yesterdays of just a camera and that's it, but I've never experienced that. What is the minimum kit?