Quick Update as a side note.
Today 2 big herds of wildebeest between Sasakwa and Grumeti River
1) Migration herd spotted starting 5 miles SW of Sasakwa airstrip right on the boundary between Grumeti reserve and Serengeti heading SW towards Grumeti, arriving soon.
2)The main migration herd spotted between 5 miles NW of Grumeti airstrip, all the way to 10 miles W-SW of Grumeti airstrip. Very spread out and seems they are stationary.