I've had amazing luck when I contact local historians or record-keepers, and I hope you do, as well.
Perhaps Wiki would benefit from a Category for "Try this resource" -- or similar. I've written letters to townspeople who run cemeteries, for example. By including a self-addressed, stamped envelope, and sometimes reimbursement to defray costs (a roll of film showing headstones and a copy of a cemetery layout showing where the Fords and Gould are buried), I've had extraordinary AND accurate assistance. The Lebanon (Connecticut) Historical Society provided info about my Colonial ancestors Nathan Tisdale and his sister Lydia; I joined for a year for a small fee. Nathan ran the Tisdale School, that prepared young men for Yale College in Colonial Times. Also two French-Canadian societies in New England have helped me clarify and nail down my New Hampshire/Nova Scotia ancestry.
In fact -- do you know what category I could use when I find a "type" of resource? I'd like to collaborate with others in Wiki who have discovered ways of getting info "outside the box". While some genealogists have ancestors who made major contributions to their communities, some have ancestors who scratched the soil, built their own cabins or mud huts, and survived the winters. It takes more effort to find them, sometimes. Low profile.
Time for coffee!