As you are aware, the public Hefner Y-DNA project is fairly transparent and shares some of it's data online, without infringing on each individual's privacy. Please see the links below. While I cannot say who tested, I can certainly answer any question about the Kit numbers and their placement in the project. In those cases where the family has provided pedigrees they are posted at World Families.
This is a link to pedigrees submitted by members to me [Robert Mike Terry] email: email@example.com
This link shows Hefner DNA Project - Background (Includes general statistics).
This link shows the Y-DNA results with the Family Tree DNA Y-DNA Kit numbers.
This is the classic view of the Y-DNA results at Family Tree DNA without colorization
This link shows the SNP values for Kit numbers. Those green in color are confirmed by SNP testing and those in red are estimated from Y-DNA markers.
Robert 'Mike' Terry
Hefner DNA Project Administrator