Hi. We took an extended 15 week holiday and drove across the States from New York to LA back in 2002. At that time, Road Bear RV, gave us a good deal and transported us to and from airports (roadbearrv.com),(just a small 19ft camper, our daughter was approaching 2 and shared our bed). Although the van was a little on the small side, we had the advantage that we could use it as a car and take it into nearby towns/cities, unlike one of the bigger RV's, where if you couldn't get public transport you'd have to hire a car too! The KOA Kampgrounds are good, a lot have pools and playgrounds, and if you're going off-season as we did (high season over there is May - end September) there is no need to book your site. A lot of these Kampgrounds on the outskirts of big cities offer day trips downtown eg Boston, New York, Philadelphia, New Orleans etc. And apparently, if you're stuck for a site, you're allowed to camp overnight in any Walmart car park! Good luck with it, it's well worth the trip!