DAAT experience
Have been in DAAT, but you may be able to use some of the info. Was on a flight from Malabo to Tunis with a tech stop in Tamanrasset (DAAT). Permit was arranged by a company from Tunisia (cannot remember the name). Called DAAT over the phone since I wasn't able to contact any handler there. They told me that I could go without handler. So I did. And everything went perfect. As soon as we landed we were reached by some airport officials, who got the fuel truck for us. Went to ATC for flight plan and taxes. Everything paid cash, of course. But less than 30 min to complete everything and go.