At least I hope it's the last dumb newbee question for the winter...what're the odds?

One of my 2010 package hives has one deep full of honey, and a medium super above with one frame of maybe capped honey (it wasn't capped last time I looked) and another frame partially drawn and uncapped (I would guess). I was going to pull that medium, but I would like to leave it there and put some dry (clumped) sugar in place of a couple of frames. Or is it not worth making the bees work that much harder to keep the hive warm? fyi, this is a top entrance hive.
I don't know how big the cluster is yet...will I be able to see that today? I'll wait until it gets to 65 degrees to go in.
My other hive is two mediums, not quite fully capped. If some of the frames have uncapped honey, should I pull one and put in dry sugar or just leave it be?
Also, the bottom board warped on one of the hives and was providing a bottom entrance (it's a top entrance hive). Suggestions for an easy fix? I removed some of the shims that probably caused the problem, but not sure if it's warped back into place. Guess I'll take a spare bottom board with me. I suspect that there are all kinds of things that I could stuff in those gaps to provide insulation--suggestions? And to think that I was worried about drainage.

At 65 degrees, how much can I pull the hives apart? I don't plan on doing a lot, really just working around the edges, but I might need to pull the supers apart.