Besides the amazing wildlife in Kogatende another very positive feature is that there are very few lodges and camps here so all the viewing can happen with few others around.
When in the area we prefer to use the lightweight camp or stay in the lovely Sayari Camp.
Tarangire National Park is also amazing during the dry season. Being a long river valley and in an area with a massive elephant population the area is the only source of water for these animals from July till mid November and massive herds can be found in the park.
We take guests on a 3 to 5 day walking safari to the very remote South of the park. In my opinion this rates as one of the top 10 safari experiences in Africa.
Other parks: is a very good all-year park. It is a small park bordered almost on all sides; it is hard for animals to move out (although it's not like they want to move out with all the water and food there). So, for a guaranteed good wildlife experience visit this park any time of the year.
Similarly, Ngorongoro Crater is good year round. It does get very dry during some seasons but the wildlife is always good. Peak seasons (December/ January and July - August) can be very busy with other tourists.