ive just come back from a snowboarding/skiing holiday in france. I'm a good snowboarder, can ride all mountain, powder and a bit of freestyle with reasonable style and ease. Though saying this there was no powder in morzine as it was all tracked out and getting a bit cruddy. I very quickly got bored of Snowboarding and decided to give skiing a go for a few days, got some good skis, boots and hit the mountain. After the first few runs i couldnt work out why i ever switched in the first place. If you are going to be skiing on pistes the whole time skiing is 1000x more rewarding, you can get down anything on a snowboard at pace, carving etc and you won't be outta breath, do it properly on a set of skis and your knackered at the bottom.
Personally i find skiing to be more technically rewarding, slightly harder to master and even the freestyle is better (IMHO)
Bring the skis, learn to snowboard (should only take a few days) then try both.
All depends what you want really.
have a good holiday and keep that weight forward, front leg bent and just go for it.
Scotty