Climbing - Arrival
If you are coming from Amman and want to go by bus as directly as possible to Wadi Rum, then rather than continuing to Aqaba, you would do better to get down at the Rashidiya Junction as described on the page cited above. You can gain considerable time by doing this, and most transport offering lifts (usually paying, but still cheaper than taxis) have enough room for a considerable amount of baggage.
The Rest House (telephone +962-3-201-8867, fax +962-3-201-4240) is the "tourist centre" of Wadi Rum right at the entrance to the village. It provides a restaurant, a camping ground, and toilets and showers. The Resthouse is the terminus for buses, it is where you are received by the officials, where you can obtain all information on trips into the desert, and this is where you meet any pre-reserved guide.
The restaurant in the Resthouse, although complete with bar which is sometimes appreciable, is rather more expensive than the other local ones - supper usually costs 5JD. Try the Wadi Petra (locally known as "Amjid's place") close by - take the first turning on the left and it's about 50 meters/yards down. Here you have supper for half the price, and often less. This is the climbers' hangout, and is popular also with the locals. You can often find useful contacts here.
You can also do your own cooking beside your campsite ; be careful, saucepans seem to be unavailable in Wadi Rum, these and sleeping bags are part of the equipment you will need to bring. It is true that food is generally more expensive in Wadi Rum than in Aqaba, the locals complain about it regularly. But unless you are really pushed for comparatively small sums, please consider buying in Wadi Rum anyway. Not only does this go into the local economy, but it helps to have good relations with the local people. Climbers are popular there, but less so when they bring in everything from the outside.