In reply to Cecilia Rinn's post on Mon 21 Jun 2010 :
Cecilia--you could make the story about the father and the history of the place without the son's permission. But-if the son is the new owner and the heir of the estate you are going to need a release from him for any current footage or family owned archival material (including brochures, etc) since it doesn't sound like you had any written agreement with the father.
You could get creative and try to track down people who stayed there and use their photos and interviews but it seems like it would be worth another try at working out some kind of agreement with the son since he is the more intimate link to the Dad.
Maybe you can find a middle ground between what he wants and what you need. If you can get him to understand you need creative freedom to get a really strong story--but be open to what he wants included maybe he'll come around. If he wants a more promotional story for himself you could always offer to make him something he could use for his personal needs in exchange for a more open agreement about the doc you really want to make.