Don't have any recent experience with CO skiing, but my one piece of advice: Just bring a spring skiing attitude. Spring skiing is great, so long as you're not psyched up for winter conditions.
The first time I went to Summit County (and the West in general), I had visions of bottomless powder blanketed perfectly over open bowls and precisely spaced trees. I got there, and it was 70 degrees for my entire trip. Disappointing at first, but once I got over the fact that I wasn't going to get that quintessential western powder experience, it was beautiful riding and a great time.
You should have a great trip, so long as your expectations aren't too high (not sure the forecast, but I wouldn't get too excited even if there's snow in it, the way this season has gone). I'm guessing groomers might be a better bet than trees, though.