Nick, enjoy your eastern shore stay. Not sure of what ride lengths you're interested in or whether you're asking for routes to ride or people to ride with. There are so many small safe roads on the eastern shore that you could probably whip something up on googlemaps by just picking the little roads. Alternatively, I rode these two a couple years back which you could alter to begin in Bethany.
http://www.bikely.com/maps/bike-path...-to-Prime-Hook
http://www.bikely.com/maps/bike-path...shopville-Loop