Exploring the temples of Abu Simbel sounds like an incredible excursion. The early departure to avoid the heat and witness the sunrise over the desert adds a unique touch to the experience. The intricately carved temples dedicated to Ramses II and Nefertari are indeed remarkable, and their preservation after being buried under sand for so long is fascinating. The guided tour should provide ample opportunity to learn about the history and the efforts to relocate and preserve these temples. Returning to Aswan around noon allows for a well-rounded trip. Enjoy your adventure!