Awsard has a reliable fuel station for civil use.
Bir Anzarane not (but can change in near future).
I saw a small pump in BouCraa but didn't stop and investigate as I didn't need fuel.
Apart from that, you can buy fuel from military at all larger bases (Guelta Zemmour, OumDreyga, Baggary, BirAnzarane, Awsard, Tichla, BirGandouz) if in urgent need. They will gladly help if you approach them with a right attitude. But relying in advance on military supplies to provide any logistic for your touristic pleasure is unethical according to my opinion.
For drinkable water, there are some reliable sources in the area you (maurice joyce) intend to visit: Bir Almatfsiyah, OumDreyga and Awsard area plus one not far from BouCraa for which I unfortunately forgot the name. There are many other wells in this area, some even with termal water, but water is mostly undrinkable.
Consult the Gandini guide for the area, there are lots of useful information there about where to go and which places to avoid. It is intentionally a bit biased regarding the cultural and historical info, but technically is a very good guidebook. I once set off to write a review of it, but stopped after the introduction ( still here, if you are interested to read).
Sorry for a late reply.
Hope to meet someday in Western Sahara, inland!
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I'm just a soul whose intentions are good
Oh Lord, please don't let me be misunderstood ...
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