Checked out the two overwintered hives on my roof to see how they were doing. The answer: Great! Healthy, strong overwintered bees are what I've got. Not looking too crowded just yet but I opened up the broodnest anyway, pulling frames of brood up into the area that other beekeepers might keep a queen excluder under to keep from getting brood in the honey they wish to harvest. This practice is called Unlimited Brood Nest Management and I think it's a good practice to get into. Toss those queen excluders, people!