My son is working in Rwanda, and we were thinking of coming to visit him this summer. He may be able to get 1 week off from work to travel with us. We aren't sure whether we should fly him to Tanzania and go on one of the group tours offered there. There seem to be quite a few companies and they all appear to be moderately expensive. Any recommendations on spending 2 weeks in Africa that would be in this particular area? What are the best travel companies to look at? What might be the sights "not to be missed"? Thanks.