Southern New Hampshire... not a LOT different than here in SE Iowa, but not sure what is in "flow" atm.. Around here the goldenrod is EVERYWHERE, and the bees are taking advantage of it..
I will give them another week or even two, depending on how long this flow lasts. Once it begins to slow, I will check my hives. I will look into the mediums.. most of my hives are all mediums, I have a couple that are two deeps with mediums on top. My goal will be to consolidate the honey they have collected. When the final flow is done, I will move the honey down, They tend to fill center frames, and ignore the outside.
IE... I have four mediums, and consider that they need THREE mediums. Two for brood and supplies, with a third medium of nothing but honey, perhaps with a little pollen in a few frames. i will pull the center frames of honey in the 4th medium down into the third medium if they have not filled the outside frames to insure that third medium is as full as possible. IF, there is any frames filled left over, I will wrap them and freeze so I can add them back in the spring if necessary.
From the last inspection, I will not have many that will go into the freezer.. five or six frames total. Not enough to add honey to all my hives if they begin to run low, but still a better option than feeding in April before the first flow starts.
Should I consolidate more by moving all full frames of honey into one medium and remove the other...or leave both mediums sitting on top of the brood box?
That is exactly what I do. as long as there are not so many bees that it will crowd them.
Leave your mediums on until the flow begins to end, and consolidate the best frames as mentioned above is my suggestion/recommendation. Maximize food, and minimize space for winter, and be ready to expand them again in the spring before they run out of room. As mentioned, if they run out of reserves in the spring, you can pull the frames from the freezer to give them.
If I run out of frames, I use dry sugar on top of the frames to help them hang in there until the flow starts.. around here, its dandelions that pop up first.
There may be other opinions. you just have to decide which of those opinions/methods works best for you, and GO with it!