We,me and sons,dived there in Last July livea board.You´ll be able to dive 20 to 25 in the week or 4 dives a day.It´s very hardcore for your body,and since you re an American Woman you must consider that it couldn´t be safe to frolick alone goin´to the flea,papirus and parfums markets like Khan el Khalili.Museuns and pyramids are always scorted by tourist nannies(don´t laugh;you are a pale face in country that the most people pretend to speak English,so you´ll be a kid lost in a crowd).Trust the hotel staff and restaurants (at the hotel)because it seems they are the only CC acceptance business there.In Sharm,you´ll have a more western atmosphere and snorkeling is fine.But even some rests and shops don´t accept CC there,except for dive shops like Camel dive and Dive shops at hotels.Concerning to dive safety,it´s possible to dive 4 times a day,but consider Eanx and constant hydration(yes,bring your own water bottle everywhere).There are some sharkdive ,but for only affortunates,because they are deep blue dive and you´ll can see dark blue bellow and light blue up and around,so set your Maxdepth alarm carefully and eye on those sharks at 20m below or far in your depth and the other in the bottom timer and gas pressure.So instructors will evaluate you week UW before to decide that you can dive there.Enjoy Thistlegorm wreck and frankly,study the blue print carefully at your house to enjoy strolling around and see tanks,rifles and bikes of WWII . It´s wonderful!