Hi Sheila,
The Wanyama Safari is booked through AKL CL. You don't have to be staying CL, just at Jambo or Kidani. The number is: 407-938-4755. If another resort answers, just tell them you need to speak to AKL CL.
They are happy to answer any questions you may have. I would ask them about how bouncy the ride is. I really don't remember, I don't think it was. They can also answer any questions you might have about accessibility.
Yes, I've been twice. The first time it was just Dh and me, the other parties were no shows. That was a memorable trip!
The second time it was full, 12 people including an 11 yo. Very fun, great food, as usual.
If you book the Wanyama Safari, I probably wouldn't book Jiko as well. The portions are generous, you won't go away hungry, that's for sure. The dinner is served family style. Lots of fun tasting, enjoying the amazing food that comes from Jiko! Wine is included.
The price (as far as I know this is currently accurate) is $190.64. per person. I am fairly certain that includes tax and gratuity. The CL concierge folks could confirm this for you. It's not cheap, that's for sure. I do think it's worth it. It's just amazing to be so close to the animals out on the Savanna. And then there is the dinner, yum!!!
Here are a few more details from allears:
http://allears.net/acc/faq_aklsunset.htm
Let me know if I can help with any other questions, I am happy to!