Jezum "V" , .. the US is a big place . What in particular suits you ? Desert ? , Mountians?, Ocean?, Cold?, Hot?, Conservitive?, Liberal?, ..(Last 2 .. Lib , hang on the coasts, Con.. flat/midlands .) If you are just trying to figure it out, do a weekly car rental with unlimted milage and work it out. BTW takes at least 5 days
non stop driving to get from one coast to the other.
Have fun