In my experience, caching in Saudi isn't like most places, but it does take after the Saudi style -- everything is car accessible. There are very few caches require you to leave your vehicle and walk more than 200 meters because there are roads to everywhere. That set me to looking for a place as close to my house as I could find while still being out in the desert, but also someplace that I couldn't just drive right up to. I understand that parking the vehicle and walking is always an option, even if it is vehicle accessible, but I know myself and I'll never do that unless I'm forced.
And that brings us to this cache. Looking at the satellite images might lead you to believe that you could drive right to this, but I assure you that you can't. At the set parking location they have closed the road with a giant berm. The property to the south is a private farm with a fence separating it. The property to the northwest is the same story. You must walk. It is about a 2km (1.2 mile) one-way walk if you stick to the road, but it could be a little shorter depending how you go. The worst part is getting over the berm at the road and the rest is easy to walk hard-pack road, or hillside trail if you prefer. On the way in you'll pass a green wadi with gushing water. It took me about 30 minutes to get to GZ, while stopping to admire the scenery, and 20 minutes to walk out.
The cache shouldn't be too hard to find. Where I chose doesn't have very many options, but I did leave 2 barely noticeable cairns to mark it even further. Happy hiking!