This may be a little early in the year, my ancient camper van has been waiting for me on Puget Sound for 18 months and will require service and some tires before setting off, so I plan to arrive in the USA, (from UK), about April 1 and set off en route before April 15, to complete the journey in one month. All advice very welcome, what to see, best way to see it.
A Canadian man I met 18 months ago suggested the Canada element was best done East to West, the views being better that way.