I used to put up military type camo using ropes between trees all the time around my large three room tent camping sites a few years back. With only a couple of entrance points to my camping area was important to us...
It all blended in just great with the woods decor. Not sure how this would do at a regular campgrounds however...
Tent camping also had another bad taste. Depending where you place your interior lighting inside a large tent setup can be a full screen movie operation viewed from across the road.
Roy Ken