Ah, only a short stop there for Petra? That's a shame, would have been worth stopping via Wadi Rum too.
Yes, rail fares are extremely complex here. Saved a friend of mine 70% on a purchase they did yesterday.......
What is this F rubbish you speak of? 
I was just about to say wow, it looks like there is now no difference in food between the F and J lounge.....
...... then saw this. That being said, the J lounge has closed the gap a bit based on what I saw over at the lounge at T5B (only has a J lounge).
Sheesh, far too early to be getting up regularly for excursions while on holiday!
Much nicer. When Mrs FB and I did that hike it was 40 degrees Celsius down in the gorge itself. A bit cooler outside of it. We too had that goat hanging around......