Where are you flying in from. It is only when you get to the US and begin to see the distances to cover and just how tiring that can be that you will realise the importance of Michael's concerns. Mine too! If you do not get a GOOD night's restful sleep, then you end up becoming a danger on the road. It could turn a trip into a nightmare.
Bring warm clothes and rethink your plans. Either bring enough money for budget hotels or to buy a tent and some semi good (warm) sleeping bags and mats.