Before planning for a desert trek, make sure the time is perfect. Check
Weather in Saudi Arabia section to understand the weather conditions in Saudi Arabia.
Before setting out, it is mandatory to check the temperature. Desert trekking in hot weather can exhaust you.
Temperature in a desert could be less when night comes. So, depending on the weather conditions, calculate in advance what could be the temperature out there. Wear proper clothing according to the climate.
Water and Survival
According to National Geographic "worst case scenario" a human only have 24 hours of survival without water in a desert.
But if you were getting it from any other source, such as food or other beverages you could survive about 3-4 days without water. Again, it also depends on how hydrated you are. But I would advise not to practice this theory, instead, carry enough water with you for your survival. For intake only, carry at least 5 liters of water per person a day.
Make sure you have got all the necessary trekking equipments as stated in the
Checklist for Trekking section. Wear comfortable walking boots that you have already tested.
Do take a basic medical kit with you if planning to trek for days
"Less Luggage; More Comfort"
If you are planning for long hikes, you have to ensure that you carried only necessary luggage and are lightweight. Heavy backpack will affect the pace of your hike and makes it less comfortable.
In the Desert
Scorpions and snakes are to be taken care of in
Saudi Arabian deserts. Both are equally poisonous, though not all. During early summer, scorpions may find your tents the right place for them. Once the tent is erected, make sure its interior is closely inspected and zip the doors properly, if it has one.
For the Bedouins as well as usual Saudi campers in
the desert of Saudi Arabia, the sting of snakes and scorpions are not a major concern. Here is the tip: The poison can be removed by slightly cutting the skin to remove some blood with a hard squeeze; wash the area with diesel or petrol, stick a piece of ripe dates (if available) at the wound and tie with a piece of cloth.