My girlfriend and I just recently completed a three month road trip of the USA and Canada. Just to give you a little background info on us and the trip we embarked on, we are both 23yo Australians and have always dreamed of doing something like this. We started in Los Angeles, CA and rented a car from autoteamusa.com. We finally ended up finishing our trip about 80 days later in Manhattan!
I don't really have the time to go into every single detail possible here right now. But if anyone would like to ask me any questions about our trip, I'd be glad to try and answer them. I know I found it quite hard to find information specific to foreigners before we left.
The 30 states we went to were California, Nevada, Idaho, Florida, Louisiana, South Carolina, North Carolina, Maryland, Virginia, Tennessee, Wyoming, New York, Georgia, Texas, Kansas, Rhode Island, Vermont, Massachusets, Colorado , South Dakota, Utah, Arizona, Montana, Oklahoma, Mississippi, Pennsylvania, New Hampshire, Connecticut, Maine, New Jersey and also Ontario and Quebec!