I am coming to visit San Diego for about a week for a wedding with my partner. I am from the midwest and like the slow pace of things, especially during a vacation. I am looking to do a day of hiking and then find a low key/chill beach or cove to relax, lounge, swim, and picnic. I am hoping to find a place that is more couples friendly, as opposed to families and lots of children. Any tips for places to be or check out would be appreciated. Thanks.