Driving in US

[GardenGert]

I have friends in Seattle, and would love to visit them, and combine the trip with visits to Olympic National Park and Yellowstone, but the thought of driving in the US (left hand drive! automatics! Cops with guns!) gives me the heebie jeebies. Is there any way to do this without having to drive?

The sat nav that came with the car we hired in Orlando actually stated the number of the junctions, which was massively helpful. Also, the junctions were alternate numbers - a bit like houses where all the even numbers are on one side of the road, and the odd numbers on the other side.