your using too many national roads! don't do that! serious... too much traffic!
muy paper maps, use only the Yellow and White roads, RED are national roads.
also, your passing very close to Sierra de Cazorla and Sierra de Segura, do some roads there... very beautiful.
another way to find nice roads is google street view, once found I mark them in paper maps ...
thanks for the advice - ill mess with the route and stay off the red ones as much as poss.