Here is what I would suggest and it is mainly from reading journals etc. as I've never even been to much of this area myself.Head up to Oregon/Washington like your planning and perhaps even up to B.C. checking out a few islands along the way.Then cut across to the Rockies either through Idaho or even better across B.C.Then head south along the Rockies checking out Banff then Mont./Wyo. before heading east across the plains to S.D. and the Badlands then generally following the U.S. /Canada border either cutting to northern Mn. then into Ca. or across Mn. then through upper Ws. /Mich.Either way ending up around Buffalo N.Y. then heading across to the Adirondacks then through Vt./N.H. to the coast.But Gordon is right in leaving yourself plenty of flexibility .I am trying to locate a journal covering some of these areas where the objective was to visit every national park in the country and he tended to wander all over but it gave good descriptions of all the highlights in particularly national parks/forest/rec areas etc.I really want to find it now as I never finished reading it but can't seem to but will post a link if I do.P.S. Here is the link I'm refering to http://wneo.org/gasp/