@Bwifan -- much appreciated.
There was a book project in the works about the Doan Gang, by Terry A. McNealy, who is a long-time historian in Bucks County. I actually heard him give a talk about the subject @ 5 years ago. Anyway, the book was slated to be published late this year. I'm not sure all of the background to what took place, but I communicated with the publisher a few months ago, and the book is not going to be published.
I did enjoy reading the article you linked. Bucks County, like many of the areas around Philadelphia, had mixed feelings about the American Revolution. There were those that were loyalists, there were those that were disaffected (didn't really care either way, and didn't want to be involved), and there were pacifists (primarily the Quakers, but a few other religious groups as well) which were not supporting the patriots.
Mark McNutt (the filmmaker) and Clint Flack (the excavation leader) seem to have just learned of the above, but anybody that studies the American Revolution, or the Philadelphia Campaign within the Revolutionary War, would know of the above.
IMHO, they seem to be a tad too sympathetic to the Doan Gang. Based on my research, and talks that I've heard (like mentioned above), I'd say that they were more thieves than anything else, and mostly just took advantage of the lack of control by either side in Bucks County, especially during the time that the British occupied/controlled Philadelphia, between Sep. 1777 and June 1778.
I look forward to the documentary. Thanks for following up on this.