To be honest, though most beekeeping sites say never disturb the bees at night, I have yet to be stung at night around my hives. In fact, even if I go out there without any gear and just scope out the hive by red light, I'm all right as long as I keep an eye out for crawling bees and avoid them. Just did that in fact...no problems at all. I can understand why you wouldn't want to open the hive up and do an inspection at night, but for most simple things it seems all right.
That said, when I went out there just now I removed the cover on the bottom board because they've been bearding a whole lot. When I did, it was covered in hive beetles and clumpy stuff that looked like cottony dust -- not sure what that stuff was. In any case, I'm really worried about the health of my hive. I think I might just go ahead and open it tomorrow and check things out...and then decide what to do. I'm going to add some beetle sheets for sure. Other than that? I'm just hoping and praying I don't lose this hive :(
On the plus side, it has a lot of bees and I'm pretty sure still a healthy laying queen. Plus, most of the frames from the original nuc are (or were, at least, last Saturday) full of honey. That just might be enough to give them strength. We'll see. Any advice would be great to hear, especially advice on things to look for when I open the hive tomorrow evening.