hello there, as i do live in dukhan for quite long time, i don't recommend you camping at um bab beach. nothing serious about it but normally people don't camp there!plus safety wise your gonna be far away from dukhan if you need assistance.not good location too i guess around there to camp, but just wanted to let you know since you've asked, you could try further down dukhans beach after the beach house (after the QP sailing club)if you know what i mean good clean spots you could always find. anyways good luck mate have fun!