When I was Scoutmaster, our troop had a neat tradition: the reception at each Eagle court of honor was hosted by the previous recipient’s family. The troop paid for the cake, punch, etc., but that family took care of ordering everything, serving, and cleaning up afterwards.
Using this system relieved the troop leaders and current recipient’s family of some work, but more importantly, it served as a bridge from one Eagle to the next and kept previous Eagles involved in the troop—at least in a small way.
Consider establishing a similar tradition in your troop. But don’t limit yourself to the reception. Perhaps the previous honoree could serve as master of ceremonies or as part of the honor guard. Perhaps he could deliver the Eagle charge. (Think how powerful the charge could be when presented by a young man who comes back from college for the occasion.) Perhaps all past Eagles from the troop could sit up on stage. Whatever you decide to do, find a way to get your previous Eagles involved. After all, the Eagle Scout trail never ends.