I didn't hunt there but I did spend some time on WSMB while in uniform ... not a place associated with fond memories for me - but - I wasn't hunting oryx either
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It's for real desert so be prepare for freezing overnights and scorching days ... there's no shade ... anywhere ... zero, zilch, nada ... but there are LOTS of rattlesnakes and scorpions. You're also very likely to hear the sound of wing mounted vulcans pretty regularly ... an eerie sound that you'll never forget if you've not heard it before.
Not intending to rain on your parade and I hope you don't interpret this a negative feedback on the place ... I wish the time I'd spent there had been hunting ... or anything other than what it was for me for that matter
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Prep for extremes in temp, sun, critters and shooting distance to your target.
Good luck and I hope you have a blast!