I had the honor of commanding the "defending forces" in the redoubt at the Kenosha event. Before we could stage our battle demonstrations, the old redoubt had to be rebuilt. The Parkside folks had mistakenly obliterated last years efforts, so we had to start pretty much from scratch.
Thanks to the efforts of Steve Gilbert, we had a pile of some 36 new fascines to work with (see article). The Parkside folks had brought in a truckload of dirt a few days prior to the event, which was thoughtfully arranged in a linear pile right where we were to build the redoubt. Using the construction techniques described above, about a dozen of us (members of Hamilton's Artillery, Butler's rangers, the 55th foot, 3rd New York, 4th Continental Dragoons and a few others) built a respectable gun emplacement in very short order. We kept firming-up the walls and refining the shape throughout the weekend, but the basic structure was complete in a very short time. We even dropped the ropeline and allowed the public to get close enough to watch our progress and ask questions -- they were absolutely fascinated by the whole affair.
It really adds to our battle scenarios to have something like a redoubt to fight over. If your unit hosts an event, try to get the event sponsor to provide us with some raw materials to work with. Even a simple brush pile would really add to the battle scenarios.