The service is punctual, regular and cycle friendly. Check timetable at station and be aware that everything changes during Ramadam. Maps Beyond main roads, they are all mostly fiction when it comes to the desert. Guidebooks 'The Rough Guide to Tunisia' rapidly falls out of date, but is excellent on background and accommodation information. A decent guide to cycling in any desert has yet to be written in English.
Recommendations Fit three bidon carriers.
Water isn't a major problem. Every village sells mineral water and the tap water is fine for cooking, but wild campers need quantity. Be totally self sufficient for bike repairs and carry spare spokes. Tunisia is full of old juggernauts and cycle mechanics who can do everything. Equip yourself with a Dog Dazzler, compass and a tooth or shaving brush for preventing a build up of sand on the bike.