Done the Nile cruise. Weather very hot - drink plenty of water - make sure only from sealed bottles, Never tap water, ice, salads etc. Natives persistent but can be ignored (Laa Shoecran - No thankyou). Found Eygpt to be a fantastic experience - watch for the extra cost visits, pyramids are an expensive tick in the box, try vally of Kings/ Queens - a bus ride away from Hurgarda.