Giza day trip up from Hurghada. Did it last week. Numbers if you are weighing it up. Pickup 4am. Just over six hours in the van each way, two stops. On the plateau at 11. Museum after lunch. Hotel at 11.40pm. Just under twenty hours door to door. That puts you at the pyramids in the middle of the day at 41 degrees. My own fault, I picked the date. Van was cold and the driver knew the road. Do it in February. Or take two days over it and sleep in Cairo.