Find the Rehoboth Marathon Facebook page which often posts venues that support the race. Also, other members are very helpful in giving suggestions for lodging.
By EMR about 2012
Real nice small town race. Some nice views. Very flat course except for some moderate hills in Cape Henlopen Park (miles 13-17). Get to run about 6 miles on a hard packed cinder trail which saves the legs. Have a big post race set-up w/ Beer and burgers. Unfortunatly I can't eat heavy food after a race and there was no light food (banannas, bagels, pretzels, etc) to be found anywhere.
Once you leave Cape Henlopen Park its all flat to the end. No real fan support at all but its to be expected on a smaller race like this. Race has plentiful aid stops and has some gel stops too.