Don't go to Vail fullstop, unless it is getting some fresh powder. You'll loose your days to traversing, and egotistical twats on ski's and there park is less than average.
Go just down the road to Beaver Creek, it is a far better mountain, and the snowboarding scene is so awesome there, just local rippers everywhere.
However if you do spend your time in Vail, try and get someone to show you the East Vail chutes if you're an advanced rider with avalanche gear. The terrain and snow conditions there are second to none in the general area.
I have just got home from spending three and a half months there, so I know the place pretty well. If you need anymore help give me a yell.