I recommend Daigle
I took a solo tour of Tanzania’s southern circuit with Daigle Tours in July of 2014. Although I was a bit wary of using a smaller tour company, the experience was smooth and enjoyable from start to finish. I initially chose them because they were more flexible, working with me to adjust a set tour to meet my needs. I was picked up by my guide at the airport, taken to 4 lodges that ranged from good to amazing, and dropped off back at the airport. In between, the game drives were awesome, one of the best travel experiences I have ever had. There are lots of safari companies out there, but I can definitely recommend Daigle.