Hi Barb, I also found the Montfort Farm / Hegeman / Onderdonck Burial Ground. It is behind the US Post Office in Port Washington, NY. It is completely fenced in and is locked up. I was able to see one gravestone and have attached a photo of the stone of DODGE, Hannah - wife of Peter Dodge - b. 23 Dec 1807 - d. 07 Oct 1849. I also am sending a few other photos of the cemetery. I have left emails and voicemails concerning gaining entrance and will send updates if I receive any replies. I live about 3-1/2 hours away and am not sure when I’d get back that way but may be able to have someone take photos of the other Dodges and forward them. This cemetery also was unmarked. I found the general location by searching the web, making phone calls and stopping at a few places and finally found it. Ty