Number 1 - Fire. Fire. Fire
Need fire to keep the animals away. Making a fire is easy and getting fire wood in the dry savanah is like seeing a fat person at a fast food place. Its everywhere. Animals are scared of the light/heat and the smoke smell is also a repellent of sorts. You have now gotten rid of most both big predators and small creatures like bugs, etc...
Number 2 - my spot
This should have been number 1 actually. Since I have food and water. I'd look for a spot as far away from any water hole as possible. That way you have minimised your chances of running into the majority of big game animals. I'd personally look for a mountain. I'll clean a small area next to the mountain and built with sticks and rocks a little barrier/ fence. Inside my spot would be my big fire. I choose the mountain because with the mountain, one of the sides where a thread could come from is taken care of. Now I only have 3 sides to worry about.
Now I'll sit back with my 2 revolvers and wait for the 40 days to pass.

show me the money!!