My husband and I will fly into San Fran early August 2006 for approx. 3 months. I would appreciate advice regarding the best way to see the US. Probably leaving San Fran. touring to New York. What are the 'must see' places en route. Hire or buy a used car? Catch a train - we have no idea. Can't really do tours because I have MS and need to sleep later. I am ambulatory but tire easily.We'd like to travel down the East coast and perhaps cruise South America off Florida Keys before heading to Vegas, returning to San Fran. We would like to see as much as possible. Thank you.