Anyone even remotely interested in visiting the DRC for Bonobos should read this: http://www.birdquest-tours.com/pdfs/report/CONGO%20PEAFOWL%20EXPEDITION%20REP%2015-ebook.pdf. Yes, it’s primarily a birding TR, but if you scroll to the bottom there is a fantastic mammal list including Bonobo, African Palm Civet, Weyns’ Duiker, Ansorge’s Cusimanse, Red River Hog, Tree Pangolin, Black Mangabey, and Wolf’s Mona Monkey! I’m now convinced that Lomako is the best place to see Bonobo and the other mammals of the inner Congo Basin.
Also some nice mammal pics scattered through the TR. There are very few photographs of most of these species in existence.