Event marching camp reconstruction problems and solutions

[Nihonius Legio]

Does anyone ever actually recreate a real Roman camp the way they did? Every night after a long march, the soldiers had to dig trenches and set up a fence around the camp. At least this was done in the glory days of Rome, it eventually went really slack. Tacitus writes about this.
Nowadays to create a real camp you would have to bring in a bulldozer since no reenactment club is likely to have a full sized legion able to construct such fortifications. I'd be interested in recreating the traps used against the Gauls at Alesia.Caesar was a genius. Caltrops would probably be easy to make for anyone who can work with metal. ya...