Does anyone wear sunscreen in jan/feb down there???
Absolutely! Just because it's a cooler temp doesn't mean you won't get some UV damage to your skin, or even visibly burn if you stay out in it long enough. You CAN burn in the winter!
I have sensitive, rosacea-afflicted, burn-prone uber pale skin and I wear La Roche Posay SPF 60 (easily obtainable these days at Ulta) with powdered mineral makeup (mine is full of zinc oxide and titanium dioxide, both natural physical sunscreens) on top, and it holds well all day. I can even get by without a hat using this combo, tho I usually wear one anyway. I top it off during the day with a fresh dusting of minerals if I need to (if I've been sweating or had to wipe my face for some reason). I can go an entire week there, out in the sun, and I do not even look like I stepped outside at the end. 0 tan (or burn in my case lol). (I use a Neutrogena SPF 90 everywhere else.)
No sign of sun damage age spots for me per my derm, and if I am diligent with application during the trip, no rosacea flares either.
Otherwise, the most useful or comfort-adding things on our last couple of trips were:
1. Everyone has a smart phone now, and we buy a few free/cheap app store games before we leave. It gives people something to do when we're stuck in a particularly onerous line. (My game this time was the free Frozen Disney app.)
2. We always take a power strip, helps a lot.
3. This last trip (for the first time) we took a personal cell charger thing, and that came in handy because the MyMagic+ app is a disaster that sucks your iPhone's will to live. One of those chargers filled up the battery of an iPhone 5 from 0 percent to 100 percent. Unfortunately because it was a corporate "freebie" thing I don't know who manufactures it, but I'm sure many of them work fine.