We visited the Selous Game Reserve last February. There were heavy rainfalls the week before our visit so we have been stuck with our landrovers regularly, even worse we got stuck in the mud with our small airplane as well when we went from Mtemere airstrip to Zanzibar. Luckily we travelled in a group of 3 landrovers, so there was always someone to help.
Selous Game Reserve is huge. Being a tourist you can only see a small part of it, another big part is reserved for hunting. We stayed at a bush camp at Lake Mwanze. From there we did a walking safari with a ranger on which we encountered girafes, elephants, monkeys and hippos. Really impressing, especially when you are on foot. Although it was early in the morning the temparatures were already quite high, about 30 degrees at 8 o'clock already. By the way: the hippos also visited our bush camp at night when they came out of the water for grazing, they just walked over the campsite and went their own way.
Our second place to stay was the Selous Mbega Camp on the banks of the Rufiji River where it is possible to do a boat safari to see hippos again, crocs and lots of birds.
Selous Game Reserve is a great place to see with lots and lots of game and beautiful diverse landscapes and not many tourists at all. If you ever get the chance to visit it, do so, it's really worth a visit.