I have flown over Al Ain old airport, back in the late 70's and 80's, but never landed, as I am sure the aircrafts insurance wouldnt have covered it, as it was classed a 'military' landing strip.
One place I have landed at is 'Jebel Ali North', which was a satellite emergency field for RAF Sharjah. In 1977 it was still clearly visible from the air. Subsequently the Dubai Model Club, and occasionally microlights flew on the site. I have landed a Cessna 150 on the model club runway!
I am certain that nothing is visible now, all gone, like all the nice things in Dubai, the site was about 1km inland from the Abu Dhabi highway, near what was Mina Seyaha.