Yellowstone / Grand Teton / Mount Rushmore - Number Of Days?

We stayed at buffalo Bill state park just outside of Cody WY. It is no the banks of the Yellowstone river. Very nice state park on the road that leads to the East entrance. We stayed there a week as we visited both Yellowstone and Grand Teton.

AS for Mt. Rushmore we camped at Custer Gulch in Custer SD. the spots are very large and it is just outside of Custer State park. Its also within 20 minutes from MT. Rushmore and Crazy horse. WE camped here for a week also.