Sounds reasonable. I'll do it that way then and use some landscape fabric over a clay berm with sand to hold it down. I'm really torn but I think I'm going to use clay instead of rock and just compact it down as much as possible. I'll probably cut a channel in the center to allow any water runoff go through the center without eroding the berm. Right now my existing landscape fabric doesn't go that far down the beach to where the berm would be so I'll have to get some more to do that.
