yes you should Think about getting a helmet. I know that some people just make fun of kids who were helmets, but its better than getting a concusion or worse. Let me tell you a little story.
Last year around thanksgiving some friends and I gathered some snow from the local ice skating rink. We made an In-run and a jump the lead up to this rail that we built that summer, We were so excited about hitting a rail for the first time that year. That first day we all greased the rail like it was no ones buisness. The next day we most of the snow had melted and our jump was a little small so we got some more snow and lugged it back to the rail. We built up the in-run but never touched the jump, Big Mistake. I was the first to go, so my two friends grabed on to my poles and pulled them so that I could get enough speed to hit the rail. After they let go I went off the jump, but instead of landing with my skis on the rail, my head hit it. I guess my edges caught the front of the rail , which brought me face first into the rail. After that I have no clue what the hell happened. My friends said that I got up and was waking around saying ' Fucking A, Fucking A, and I think Im in shock.' Then the said that I collapsed. After that I remember waking up in my bed with dried bloody face and a real bad head ache. I had no clue what time of day or what day it was. I thought that I was on christmas break while it was actually Thanksgiving. I had to keep re-checking the wether channel to see what the day was. I couldnt remember what had happened or anything, This was the scaryest thing that has ever happend to me, I lost so much of my memory that day, but I later regained it. Im just lucky to be alive because Ive heard about alot of people who have had brain swelling from accidents like this. Its so easy just to make one wrong move like I did that day, that its just not worth taking that risk of ending your skiing year or your life for that matter. Ever since that Ive been wearing a helmet. I have a Giro 9 and their really comfy and light weight. I feel alot safer while a wear it which is good. Anyway, I suggest you should get one because it could save your life some day.
Have a good season!