Seriously?
I haven’t gone to Colorado in May for a while. But even in late April, Breck was pretty deserted. So is A-basin except on weekends and powder days. Hard to imagine how “packed” A-basin is in May. And even if it is, whether it gets any relief by Breck being open.
"Except on weekends and powder days"?
Pretty much every ski resort, even crowded ones like Vail or Snowbird, are only truly crowded on:
1. Weekends
2. Holidays
3. Powder days
If Abasin is crowded on weekends/powder days in May, it's fair to say that it gets packed in May. Obviously non-holiday, non-powder, non-weekends aren't going to be crowded that's just the way skiing works!