Tanzania

Hi,
We are three French students, and we are going to spend one month in July in Tanzania, lodged and fed by tanzanian families, which we have found thanks to Internet, one lives in Morogoro and the other in Arusha(it's a Pastor who receives us). We'll stay in these two families and visit the country, the Kilimandjaro, parks...
What do you think about our project? Have you got any adress to give us in order to find people to help us to visit, receive us a few days...
Please if you have any advices, tell us because it is the first time we go to Africa.
Thank you
Clio DELANOUE