Do Overwinterers spend the summer months in Europe

There has been a lot of questions asked about spending the winter in Spain or Portugal and clearly a lot of people like to escape to the warmer climes to avoid, currently about -6 outside! However what has intrigued me is whether any of the overwinterers also go to Europe during the Spring/Summer/Autumn? If not is there a particular reason you don't venture there during these months?

David