I too am descended from Joseph Lamp and Martha Hesson, and being of the same blood line as Leah Lamp who married William Wilson, who was from the Bear Clan of the Cherokee nation. Which was composed of both Powhatan and Cherokee, the Chief of the clan is Chief Walking Bear WILSON, who is a direct descendent of William Wilson amd Leah Lamp.
There is a website with the paper work to fill out, just key in Amonaquath/Cherokee and it should come up. It takes a while to get your papers back as Chief Walking Bear has been ill. I have talked with him on several occasions, you do not have to prove 'degree of blood' just ne a descendent.
We are distant cousins, but still welcomed into the tribe.