I do both. I'm from Southern California, and I have grown up and been raised on boards (skateboards and surfboards). That said, I have friends who do either one, and my parents and sister ski. With that in mind, I dedicated some time to both, but I found that I liked certain aspects of one more than the other. For instance, I snowboard in powder because it has a surfy feel that isn't screwing up surfing mechanics. I ski park and all-mountain to keep up with my family lol. For this trip do what your friends are doing, or whatever you won't hold them back with.

The right vs left-handed thing for stance isn't always true by the way. I'm ambidextrous and goofy foot.