HELP needed from the more experienced! I'm creating an Island with an archway and a beach. I want to bank my rocks from front to rear same as the substrate, I like the base features of the rocks and don't want to bury too deep into the sand. Obviously this is going to create issues with try to keep sand and soil separate. I have thought about Egg crate but think it would be too rigid (trying to get the rocks to marry up beside each other). I have thought about putting in a divider but I won't know where the rockwork will finish at the front.
What way would you do it?
What way would you do it?