Quad bikes
There are dozens of operators who seem to use just the same route, length and sequence of stops: when you drive, you meet many groups who follow just the same route as yours. There are several really shaky pieces of the route, very much like a washboard.
Wear a long-sleeved shirt; shoes are safer than sandals. Always wear a helmet and make sure your travel insurance covers this activity. Expect all your wear and skin to be covered with grey dust.
2 hours of riding is just enough for a non-professional rider; expect several stops along the way. It's ideal to start your ride at 4pm or later--to catch a sunset and ride back when air is not that hot.
At departure point, choose a bike in the beginning of the motorcade: being one of the first allows to drive faster, and results in less dust.
Tiba Safari / Tiba Trip
Sold by Orbit agency and many others. Groups are 10-15 bikes; two persons per bike is allowed although bikes are originally designed for a single person. Tasting Berber tea is very risky for your stomach--proven several times. Group is accompanied by a car with camcorder--video is not worth buying, and the car generates much extra dust you can't do much with it unless your whole group ask in advance to not make video at all.
Diving
Divers International
PADI five star diving centres offering daily diving trips, PADI courses, and liveaboard safaris.
Tiran
The reefs of Tiran and Ras Mohammed are known as two of the best diving-spots in the world. They can be reached by boat from Sharm within two hours. Ras Mohammed is the name of the southern most point of the Sinai peninsula. There, the current of the Gulf of Aqaba meets the Gulf of Suez. Due to the increase of plankton in the water the amount of fish is incredible. Huge schools of Barracudas, Sharks and Murrays can be seen there every day.
diving safari
Smarter divers book a diving safari. This way you avoid the crowds at the popular spots and have the possibility to dive beautiful reefs way beyond the reach of any daytripping boats. The overall costs of a diving safari does not exceed daily diving and it saves you a lot of stress.
Stables at Sofitel Hotel
Helpful personnel. Require helmets provided; several pairs of riding boots available. After the ride, offer you to give showers to your horse. Bambi and Kelly are declared as the fastest horses. Too far from the desert: in 2-hours route, only 40 minutes is actual ride in desert, the remainder time is spent to get there and to return back. For 2 hours, better choose stables at the edge of desert.