Western concepts of property rights don't mesh well with the nomadic lifestyle of East African tribes like the Masai -but it's possible that eco-tourism can.
Elias Morandot and his wife, Mary, have been visiting California and reporting on the circumstances that face their Masai people as guests of Global Partners for Development, a Rohnert Park based non-profit that provides heath, educational and economic development assistance to small rural communities in East Africa, including Morandot's villagage of Arkaria (seen below.)
A more detailed analysis of the Maasai tribal land rights issue can be read here.
Ngorogoro Crater is one of the most popular destinations for tourists to see African wildlife within the Masai people's traditional territory. Two others are Seregeti National Park and the MasaiMara National Reserve.