They "summer". They don't do "weekend" homes.
When we bought our home in Georgetown in our early 30s, all of the neighbors were asking where we "summer"

. It was a ghost town from Memorial Day until after Labor Day. The answer for all of them was New England/Cape/Nantucket/Maine.
People didn't do 'weekend' trips frequently during the year. The retired ones also had homes in warm climates for winter.
My husband and I only vacation to cooler/no humidity places in the summer. I could not do Rehoboth or Eastern shore or anywhere south---way too damn hot, humid and buggy in the summer. Far north is where we are going to buy.