Outerwear is my last remaining dilemma before I start walking on September 7. I expect to finish around October 20. It's the variation in temperatures that's confusing me. I tend to run cold but sweat a lot and will quickly shed layers. I'm taking one short and two long sleeve, ultra lightweight SPF shirts. Here are my choices: ultra lightweight down jacket; ultra lightweight down vest; long sleeve technical fleece with hood; long sleeve pullover fleece, short zipper. I'm willing to take 2 of them if necessary. I know everyone has their own opinion but I'm really torn here! Any advice is appreciated. Thanks.