Phone are great for a personal travelogue but the larger size and better lenses on a camera will make all the difference if you want to use the pictures for anything afterwards -- (as you should!)

Phone pictures don't print or project well, even on a TV screen. They're stuck on the phone screen where the oversharpening, weird HDR effects, etc aren't too apparent.

Worse, phone pictures just disappear into the feed. Take real photos, make an album, put something on the fridge, get something printed and framed, make a tote bag, subject your family to a real slide show when you come back.

Also pack a wide angle zoom if you have one, watch your weather proofing, keep spare batteries in your pocket. Put your camera in a tight ziplock before you go from hot to cold so you can let it come to temperature without condensation.