Yellowstone & Grand Teton next summer, from Colorado Springs

In our early years we did those long days trips. But looking back they were hard on everyone. I would suggest a stop half way to break up the trip. On our trip to Yellowstone we stopped in Casper WY which would be a bit more then half way for you depending on where you want to visit first. There are a number of campgrounds to choose from in Casper. From there it is an easy drive to the Tetons and the south entrance to Yellowstone or to Cody and in to the east entrance. Lots to see on either route.