There is no question the entry/exit stakes have been successful at eliminating wear and tear on the golf course. Again, the rule is to stay on the fairway and do not drive in the rough.
As an experiment, I am adding another set of stakes on the 5th hole. This way, if you hit your drive to the base of the hill, you may not need to enter the fairway from the start. This simply gives you another option. If this seems like it is helpful, there is potential to do this in other places.