For help with more-adventurous Empty Quarter expeditions, contact the desert specialist Mussallem Hassan who runs this experienced agency. Born in the sands, he organises full-board five-day trips (OR200 per day, one to three people). For a modern-day Thesiger experience, driving the whole Saudi–Oman border to UAE, (OR600 per day, maximum 12 people, minimum two) takes 10 days.