Closing day at Stowe last year was 4/20 and it was def fun cos we bbq'ed and it was hellah hot.
Spring skiing is spring skiing, total hit or miss. Sometimes the slushier conditions can be fun, but if things get too torn up then it's just frustrating and more work than it needs to be. There's a higher chance of rainy days, one day in particular we attempted to use ponchos, but everything was just drenched and it was impossible to deal with.
Figure out what mountain you want and what week, and check out the crew you're with. If you've got one friend who's gonna bitch the whole time because conditons are top-notch, well then try a diff week or try a diff friend.
hah wow i just didn't help you at all. my b.