El fin de la semana.

THE PRESIDENT HAS A RETREAT CALLED CAMP DAVID

Weekend get away packages are a great way to spend a few days off. The packages are cost effective. Most packages include accommodations as well as entertainment options.

You can't say "At the Weekend", it's not proper english. You can say "on the weekend" if you mean, for example, "we can't go to Disneyland today, but maybe on the weekend we can."

We do not use "at" with days. We say "on the weekend" or "for the weekend." Go picnic on the weekend.