After a very cold early spring, I was able to inspect the hives  completely and clean up the bottom boards. Other various parts of the country have had unusually cold springs also. Example: Silver Maple flowered on March 23rd. last spring; this spring, at least ten days later and then for only 2 days of 50-60F. degree temps.
I overwinter my hives in three deeps that are wrapped also. This is what I have done for three seasons, mostly because I fear the bees will starve. I overwintered one hive in 2 deeps that went through the winter OK.
I had other "responsibilities" that needed to be attended to so I didn't get out to the bees during a warm spell in March or early April like I should have when the population of the hives were lower. It doesn't take too many weeks of brood emergence from mid Feburary through March to have a sizable number of bees.
Upon inspection, the hives were obviously well populated with bees, top to bottom. Disassembling three deep boxes, setting them aside, and scrapping/cleaning the bottom board with the foraging bees not knowing where to go of course was quite hectic for me and the bees!!
The pollen and brood appeared to be at random throughout the frames.
I plan to cull out bad/older frames and introduce small cell foundation in the center. I guess this is the only thing I can do to regain some control over what the hives are doing.
I know, this is perhaps one of the disadvantages of overwintering in three deeps! Oh well,.. live, beekeep and learn. Last year I just removed and cleaned up the bottom box and added it later.
Any advice or,...reprimands/suggestions?