Egypt is a great place... be aware that everyone wants to sell you something. If they don't have what you need they know someone who has, and they will take you in the other part of the town just to meet that person... When you go to shop, never ask "How much?" Try to show no interest for their products... They will start to offer what they sell for next to the nothing... Stay few more seconds before to accept the deal... Find from internet how much is the average cost of taxi per mile / kilometer. It is really very cheap because the gasoline is probably cheaper than the drinking water and the cars are mostly very old and very bad. Decide yourself how much to give to the driver and at destination come down first from the car, take your luggage and finally give what you want to the driver. 99% he will thank you and that's all. If you stay at a four or five stars hotel, probably the driver will show a great dissatisfaction regarding the payment no matter how much you give to him. In this situation increase with 10% or 20% the amount. If he still is protesting, tell him that you know the average cost per kilometer and if he is not happy you will ask the help of Tourist Police... This is the magic word and he will leave you. Remember, never ask anyone in Egypt "how much" and look as much as indifferent as possible for what they sell even you are interested for that. You will end to pay 10x more otherwise.
When I went in Egypt I considered first that the ancient part is the magic... The reality is that today's Egypt fascinated me. Their culture, their customs, their foods... Cairo is a very nice place for a photographer and I do not mean the touristic part. They have tens of thousands (some says hundred of thousands) people living in cemeteries... There is a huge area inhabited by poor Coptic Christians that are trash collectors and raises pigs in their own houses ( because is a Muslim Country there is no pig farm there but the Coptic minority is a great market for pork meat...) Close to that area there is an open air impressive sanctuary / The Cave Church.... Very nice to visit if you can survive the bad smell when passing through trash collectors district
When going outside typical touristic areas, every woman should have long sleeves, avoiding short pants, short dress, etc, otherwise will be treated as a prostitute or like an offense to their faith. Also for westerners, never ask anything on streets a local women... ask only men on the street, but better don't ask anyone... Or ask a policemen, they are everywhere and are quite friendly.
Take your camera and your lens with no fear... the dust is not as bad there... I met much worser places... And Egypt is a great source of inspiration for a photographer. Have a great time!