The difficulty/terrain does not include the way to Tanzania itself
but from Parking. It is a long
drive from Arusha.
When you want to visit Serengeti you can see Naabi Hill just long
before you arrive.
In the Rainy Season you'll find a lot of Zebra and Wildebeast
even in this area.
Arrived at Naabi Hill Gate in order to enter Serengeti, your
Driver-Guide has to do some paperwork.
Find the box at the hilltop. Take the path starting at the parking
area, up to the summit and follow it a few meters behind the top
tree. Under a flat stone next to two other stones you'll be
right.
Avoid any contact to animals, they can be dangerous. You go on your
own risk!