Climb gradually from Wadi Musa, and follow the King’s Highway high above Wadi Araba. Continue on a dirt road into Rajif; and after returning briefly to the King’s Highway, begin a lovely descent along dirt roads to the valley below. A short climb to a low pass then takes you into a wide open desert area for the last few kilometers to Abbasiya.
Petra/Wadi Musa has numerous stores and restaurants. It is the best resupply point before the end of the trail in Aqaba.
Taybe has a few stores, a couple of bakeries, and a small (falafel) restaurant. Petra Overlook Shop has some snacks/water, but it’s hours are variable.
After Rajif, there are a number of spots, just off the dirt road, that would make attractive camp spots with shade and views.
Buses from Wadi Musa travel the King’s Highway north and south — it’s unclear though if they could take a bike without first removing both wheels. A Jett bus goes from Amman-Petra (and vice versa) daily. It can accommodate bikes.