Welcome to Epic. I check out one of the Dew events at Breck last year and don't remember it being much different than normal other than going to watch the event itself. Breck can get crowded at times, but there are 4 peaks to choose from, so you usually have some options.
I don't recall if it was during the Dew tour, but I did have a teenage girl wiz by me there once and yell for me to get the F___ out of the way (or maybe it was watch the F out) but that sort of thing is much more the exception rather than the rule. If anything, the Dew tour congregates these type of people in one part of the mountain (peak 8)
The best discounts for Breck are of the season pass variety if you are skiing Vail owned resorts ~7+ days. Cheapest is the A-Basin bonus pass or the Summit Value pass 389/429. If you are only out for a few days, you could ask a season pass holder to hook you up with a discount or get a loveland 4 pack this month for 129- can be split up