It is indeed a category B property, however I´m not 100% sure how the ovation certs would work at the Masai Mara Safari Club.

The Masai Mara typically has two kind of rates:

1) overnight accommodation only (usually in the $100-$300 range, park entrance fees not included)
2) rates which include overnight accommodation, three meals and two daily game drives (and possibly some other stuff) which tend to be in the $600-$1000 range