Tom I just use screws. It doesnt take much time to take off (maybe 5 min). I plan on using those push in plastic plugs to fill the holes in the winter.
And yes, they are Dzus fasteners. I was going to use them, but you have to drill a large hole (1/2" IIRC) in the bumper to use them. Since I would like to have something fill them in the winter, I just decided to use screws so I could use those plastic plugs.
