We have always ended up working into the summer because we're not "done," but every year hope that somehow we would be done by now. Last fall we were all ready to start early and the hurricanes interfered.
I wonder if the energy would be better if we intended to work through the summer, but I suspect not. I am really programmed for the summer off and since dh usually has most of the summer off it really irritates me. Many families here in FL work through the summer- the weather is so awful there's nothing else to do here anyway.
I am interested to hear how it goes for you, so please update us!

