Newarknut,
My inlaws have a winter home near WDW and they spend a lot of time in the summer there as well because they miss the restaurants, parks, etc. They have to be there to do some required maintainenance and to check on it.
That said, they will do a few chores very early in the morning, stay in during the hottest part of the day, and then go out at night. It's difficult for them at times, but the trade off is missing the cold, wet winters we have here.