I think it cost around $100. It was a gift from my wife so I'm don't want to ask exactly how much, but it was around there. I know it's more if you use one of their trucks. It was a little pricey, but well worth it in my opinion. Plus, the guide told me to call him direct next time I come out and he would take me or groups off property.
Your right, their FJs are all stock autos. I too have an AT but have a Donahoe lift that definitely helped in the water more so for peace of mind than necessity.