Here are pictures from Assateague Island National Seashore.  I really only wanted to go here so Anna could get another stamp in her passport, but I am so happy we visited and I would love to go back.  It was beautiful.  It was so serene and peaceful, and had some of the softest sand.  Their campgrounds looked really nice too.  We did not see any horses up close but with all of the warning pamphlets you get on the way in, I am OK with that.