We school year round but we do HOD between August and June. We do take off about 8 weeks through out our year. I don't mind going later than June if need be to finish up but I don't like feeling like we have to accomplish something over the summer. That way if anything comes up, then we aren't tied to school. For us, because my kids NEED a schedule, I will usually schedule some school over the summer for them to do but it isn't HOD stuff. I make my kids read for 1.5 hours per day. They do some type of math review - it could be games, it could be a worksheet, but it is something and usually only 10-15 minutes or so long. And then we will go through and do something as a family just to learn about something we want to learn about. And finally, I do have a read aloud that read every day to them. My kids LOVE when I read to them out loud so we make sure to include that in our day
For us, this seems like a great fit. My kids have a "schedule," which they need desperately. And we get to have fun as a family learning about something fun together. My kids love it.