I just got back from 11 days of walking & wading while fishing the shoreline around San Pedro. Aqua shoes are the way to go. Wore mine almost all of the time I was there. The sea grass is no problem, but there is a lot of coral and more than a few conchs buried in the sand. Litter can be a problem, too. There's no deposit on glass bottles (subject of another thread I'm going to bring up)!