I’m planning to walk the Camino Frances between September 20 in SJPdP and ending October 31 in SDC. I’ve read lots of posts on clothing layers, merino, keeping the pack light, etc., but I haven’t yet found a discussion of long-sleeve vs. short-sleeve base layers for October and lightweight vs. mid-weight merino. For those who have walked at that time — while walking (not post-hike) is a short sleeve merino T-shirt more useful than a lightweight long sleeve shirt as a base layer? Did you pack a mid-weigh merino (around 250 gsm) or stick to what’s typically advertised as lightweight? I’ve already figured out the warm layer (a lightweight shetland sweater or a nanopuff), but I’m now trying to figure out if I had three merino shirts to bring, would it be 2 short sleeve and 1 long sleeve, or vice versa, and whether I would want to the long sleeve shirt(s) to be lightweight or mid-weight merino. Thanks in advance for your thoughts.