I'm excited to be traveling to Patagonia in October. I will be going on day hikes only, no camping. Please recommend what sort of jacket I should bring. I considered a 3 in 1 jacket but now wonder if a fleece jacket & lightweight waterproof rain jacket would be better. I live in the tropics & will need to purchase online, so it's impossible to try on. Any suggestions you can provide will be appreciated. Thank you.