In 23 days in September, with 2 adults (only 1 driver) and 2 kids (4.5 and 6.5 years old), we are planning on driving from Northern California to New Hampshire and back. Our plan is a week each way, a week in New Hampshire/New England and a couple of extra just in case days. Are we nuts? Ok, even if we are we need some tips, suggestions, guidance. We have family/friends to see outside of Denver and Chicago but beyond that we are open to routes and suggestions. Any input is greatly appreciated.