i plan on it...with short breaks here and there....i see no reason to take a long break and NOT be learning something a few times a week at minimum...unless we are on a vacation (which is really an extended field trip in my eyes :P)
We school year round. Our life can be kind of crazy, so I do not plan days off or breaks. We just take days off when we need to. Take this week for instance. I did a lesson plan for this week. Then we ended up having a crazier week than expected and the weather was amazing the last 2 days. So..we dropped all work to enjoy the weather and deal with life. The oldest two spent the last 2 days helping me clear the garden and studying the veggies left there from last fall. Carrots, turnips, petrified squash seeds etc.
I had an appointment today and we had to go to the store. Tomorrow the weather is going to be crummy again so we will get back to hitting the books.
We are very flexible with our schedule. It probably sounds like it wouldn't work, but they are both ahead of their grade in reading and math. Plus they love to learn, and my son knows more facts about animals than anyone I know. Stuff he chose to learn on his own.
My kids are still pretty young and school doesn't take very long each day. They are constantly doing/learning something.
My plan is to make sure we hit the 180 days, but not stop just because we do. Yesterday I figured out that we can start the last week of August and take a week off every other month in sinc with DHs week off and still be done by mid June w the required days. After that we'll relax some but not quit all together. I'm using this summer to get them use to doing an hour of review each day. But unless we take a trip somewhere, that's all the 'schooling' I plan for the July-August time.
We mostly follow the school calender, but during the summer we do just a little each day to help retain the knowledge learned like multiplication, handwriting, and such. I have bought a book with summer bridge activities for the summer where ds does a couple of pages a day.