Living three blocks from school and possessing a full set of keys, I don't really have a whole lot of excuses not to work over the summer (except burnout avoidance). Throughout June and into July, I was caring for our late-blooming silkworms so I went in every couple of days.
I haven't been to school for three weeks. The administrative staff is back in today, and so am I. Something nifty is happening, so there will be a lot of people there, but it is still a little jarring.