It's hard to say exactly where the wildebeest are, as they are everywhere! Driving through the woodlands and anywhere out on the plains, they are everywhere but really spread out.
The plains between Naabi, Hidden Valley and Ndutu are covered with wildebeest and the valleys surrounding the marsh areas are full. Unconfirmed reports of large numbers up round Barafu and Gol Kopjes and right out to Kakesio and Kusini.
It's difficult to get a good photo on a flat plain to show the scale of the numbers, so, instead, a photo of the rain clouds, continually dumping rain all around the area.