In terms of the succession, you might look to have George Washington succeeded by the descendants of his aunt, Sarah Haynie nee Ball (mother's sister). She would have to be grandfathered into the Royal Family, but she has living descendants even today (myself among them, though too far down a series of female lines to be relevant to the succession assuming continued male primogeniture). I believe at the time of George Washington's death she was his closest blood relative (and only her children were also his blood relatives).
How accessible is such information? Is it on the internet?
