jmorrison,
That's actually the method we currently use: either masonite wood boards or topsoil bags. The trouble is, they never really seem to result in a high enough / strong enough / bold enough lip once the sand is in place.
Mike Nuzzo,
Your pics are, I believe, what I'm looking for. Think of the bunkers at Riviera, since they're fresh in all our memories: big lip, sometimes a foot deep, with the grass growing over the edge in areas. It really adds definition to the bunker. How do you create the look in your picture? How do you ensure that the lip doesn't collapse? Any help would be great!
Don Mahafey,
You're quite right. I should've perhaps used another more inclusive word.
Jeff Mingay,
Fine. I'll be sure to keep MY secrets close at hand at the next Toronto GCA gathering...