Fly in safari to the Maasai Mara. This the best way to get to the Maasai Mara as the roads are not good at all from Narok to the main gates.
Flights are with Air Kenya a well known operator in Kenya with a very good reputation. The flight is just under an hour, but you have to go to a couple of other airstrips before yours so do not worry about it, someone will be there if you have any questions.