Riverside look like bungalows and is detached from the main building/ Fairmont Deluxe. You’ll have to walk up the heel or take a golf card to go the the main building for restaurant and bar. Spa room is by riverside. Having visited both, you want to be at Fairmont deluxe, second floor. I hope this helps

Most flights route through Wilson Airport in Nairobi, but there is some direct service from Nanyuki to Mara. (Direct flights sometimes stop anyway, depending on the number of empty seats....) I recently used Kenya Expresso Tours and Safaris for a safari in Kenya and Tanzania, and I would recommend them, both for providing a driver and for making other arrangements as you might need. You can read their reviews on TripAdvisor.

At the reception desk you can reserve activities. Try to reach them by phone ? They have a lots of activities available, but once there, it seems like not all were available, full or still a possibility.