Buy a stabilizer so you can make good walking and running shoots. Even if the phone has good software stabilizer an external will be so much better. Install Filmic Pro and learn how to use the software before you travel so you can enjoy both the trip and get good shoots. It also depends on your budget and what type of cinematic travel videos you want to do. Night and low light shoots will never be as good on the phone compared to a dlsr. Look at youtube for travelvideos and behind the scens videos.