We only stayed one night at Olduvai camp but enjoyed it very much. The tents were more spacious than we had anticipated, and the staff and food were great. Meeting the resident genet at dinner time was a plus.
The tents, located at the base of a kopje, are permanently erected, and covered with a thatched roof. For most sides of the tent, the canvas can be unzipped leaving a screened area. However, the toilet, shower, and wash basin areas are not contained within the canvas area, although they are still underneath the thatched roof. This was a little unsettling to me, especially if using the facilities during the night, feeling that I had to look out for spiders, snakes, rodents, or any other crawly thing that might have been lurking.
The bed was clean and comfortable, and the bug spray they provided to spray our tent before dinner was effective - no issues with mosquitoes or tsetse.
All in all, it was an enjoyable stay.