Hi Brenda, I'm an ex Brit citizen.
re touring North America, the first thing you have to realize is that Europe is small, and North America is HUGE. So if you are planning to do the BIG TOUR of North America, the thing to do it in is a van. I'm not aware of your family situation, but if you are limited to two people, a van is de rigeur, (the way to go). With a van, you can go grocery shopping in it, go downtown to sightsee in it, park it in any parking space, and drive it easily at 110 or 120kph. People in N.A. who tour in bigger rigs tow a car, and that's a pain. The people I know who want to do THE TOUR tend to spend two or three days in the van, and then a night in a motel for a real shower, laundrette, dinner out, and so forth. Many people with bigger rigs who want to TOUR, eg Alaska etc, park the big rig, buy a van, and sell it again after a year.
There are so many things to see and experience in N.A., and the distances are so huge, get yourself one of those Merc diesel vans and you will be happy.
Rankjo