Hi, I am looking for advice for a roadtrip my family of 5 is planning in the summer months across the US. We have 9 sites we'd like to see with a day to visit each with the exception of two which we will spend two days visiting. I am trying to determine the best mode of transporation and the time needed. I was originally thinking we'd travel by RV but I am not sure if that's the best choice or not. I've also thought we could RV one way, then Amtrak back maybe. We have three weeks to complete our trip. Our destinations of interest are Yellowstone, Grand Canyon Mt. Rushmore, Nashville, New York, DC, New Orleans, Chicago and Savannaha. Another idea is maybe Amtrak the whole way with their 30 day pass and rent a car two venture out to the points we want to visit. I really like the RV idea but I am just not sure if we have the time to do that. It's difficult figuring in site seeing, drive time and sleep time. I've read that we could get one-way in 9 days taking our time so I was thing we could do 18-20 days total there and back. But then I have others say you'd need four weeks. So I am just not sure. Any advice?