I've rode on tours to the beach on MD/DE Eastern Shore, the roads are flat & mostly straight with wide shoulders so that one can even read a magazine/Iphone etc. OTOH I find that cycling thru long & quiet rural sections is both boring yet relaxing. I think the endorphins from the physical effort make the boredom not only tolerable but enjoyable. Well to break up your cycling days maybe you could stop for a little sightseeing, food-shopping, posting to friends etc. I have an MP3 player with a movie that I was planning to watch on my latest mountain trip...I was waay too tired to even consider watching it heh. One could listen to audio-books while rolling.