I have been slowly refining my gear over the years and shall continue to do so as I lead up to my Three Points of the Compass Walk. Starting, as I am, on 1st April 2018, I can expect just about any form of weather so I already know that I am likely to be taking more than I shall need. No doubt I will have too much clothing in anticipation of cold weather, while this may occur, who knows!
Linked here are a couple of my gear lists if you are interested. My Big Walk list for 2018 is very much a work in progress.