well, the west coast tour is great... and i tend to agree with RWTD and others about Idaho/Montana then maybe heading up into Canada as Nebraska/Dakotas are pretty barren (although i honestly have never been to this part of Canada to the north) and then minnosota-great lakes - NY,VT,NH,Maine...

on a move from Portland OR to Massachusetts 3 years ago i spent 2 weeks mostly visiting national parks along Idaho-Mt (Galceir)-Wyoming (yellowstone/teton)-s dakota (badlands)--- and then road-tripped the dakota to adirondack leg and then spent some time in NY...

it does seem like the Nebraska/Dakota stretch would be LONG on the bike.