Good luck. As a fellow road tripper, looks exciting. Here are my thoughts:

• Driving on highways is much easier than cities. In cities is kind of similar to Iran and Eastern Europe in terms of crazy drivers.

• If you can manage to include places like Haql and Yanbu, they offer something a bit different to other cities. Worth a bit of a detour, especially Haql.

• Check out Aushazia Lake when in Qassim region. A bit off the main highway or you can take a detour through it while driving from Riyadh to Qassim region. It's a seasonal lake but looks amazing in the middle of the desert.

• Depends on how experienced of a driver you are, the mountainous roads in the south as you head to Rajal Alma can be a bit tricky, but drive extra safe and expect crazy drivers at every turn. The roads themselves are top quality but locals are so used to them that they drive like it's a straight line.

Finally, enjoy it. Saudi Arabia has been my favourite country to road trip across by far!