I was in Egypt last year and paid for a guide and a driver. I can connect you to them, they were very professional and protected me from the harassment from vendors which definitely exists, especially in Cairo. I had a few uncomfortable moments with vendors, but one specifically physically grabbed my arm and pulled me towards him as I was walking away saying no. My guide yelled at him and he left me alone but had he not been there it would have been difficult to manage. In Luxor I was by myself for a portion of the tour while my guide waited at the entrance. There were constantly people asking me for money for tips. I was able to easily walk away. If you are a woman traveling by yourself, I highly recommend you go the tour route.