Re: Overwintering colonies in Virginia
William, 40# of honey or capped sugar syrup will get you through winter and into Spring here in VA. You will not need to wrap the hives or insulate unless they are in an exposed open field. I do insulate the inside of the telescoping top to cut down on heat loss. A piece of 1/2" foam board from Lowe's is what I use.
The mite issue is one you will need to address. You should start treating no later than the beginning of August. The bees should continue to raise brood into about the second week of October. After that, you will winter what you have so they need to be mite free and healthy.
Thankfully, the bees are smarter than I am. They are doing well, in spite of my efforts to help them.