Hey Dude,
The trick to Vail is that there are always areas there that will be crowded, as well as areas that are virtually empty even on busy holiday and vacation weeks. As for the crowds overall; they shouldn't be to bad Friday, be prepared to share the back bowls (particularily Sun Down and Sun Up bowls if it has snowed lately) with the Denver weekend warriors on Saturday and Sunday. I'd say your best bet is to hit Blue Sky Basin in the morning (you wanna hit Lover's leap and Earl's bowl first), then head up the Sun Down Bowl double (slow lift but worth wait), at the top, make a sharp LEFT and stay as high as you can across the traverse, you will go through some trees behind the top of the Game Creek Quad and then be on the less-known side of Sun Down bowl, basically pick a line; good pow here even a week after a storm. Head back up top and get over to the Northwoods Quav via the Wildwood or Mountaintop lifts; hit Prima and Pronto for great bumps and Prima Cornice woods for a sick backcountry-ish experience. Finally, if you have eany energy left, head over to the highline double (below Northwoods) and ski Highline or Roget's, the two most killer bump rund at Vail. Thats my recipe for a good Vail day; hope this helps,
Phil.