it can be done. We saw a lot of the highlights. If retired and have more time, take more. The gas cost is still the same. If working, I understand why you want to cram as much in as possible. At times, I felt like I worked my but off. My wife and I did a similar trip in a tent in 1998. This one was for the kids. At other times, I was able to chill and relax.
I say go for it. We had the attitude that if it started to be too much, we would hunker down somewhere and lose some deposits. The kids woke up excited to go to a new place most days.
