Guys
Quick question regarding auto ISO settings for wildlife photography;
I am heading to Tanzania in January for my first Safari and want to try and get my head wrapped around the auto ISO setting for Nikon. I know how they work I am just trying to get a feel for what you guys use when you first set off into the wilderness meaning low light to midday light to low light. What I am thinking for anything bigger than a dog;

Max ISO 800 for a D800 with 1 x focal length
Max ISO D4s 1600 with 1 x focal length

For small birds ISO 400 max

What do you think recommend???