The passenger ferry always goes, but the vehicle barge only goes when there is enough vehicles or you can hire the barge privately and it will go when you want ( this is the expensive option)
Motorcycle - have no fear - you can put your motorcycle on the cargo barges which always run too. It will arrive a day after the Passenger ferry (if you load the same day as the passenger ferry - if your good, you could try and load the day before and 'inshalla' it should arrive the same day as the passenger one.
All other vehicles - get in touch with Mr Salah, he will tell you directly if the vehicle barge is running or not or when it is expected to. When you arrive into Aswan, go and visit him in his office and he will tell you to turn up again on Saturday (this is to count how many people are actually wanting to take the vehicle barge on Monday) If there isnt enough or if the barge is broken or whatever you will be asked to come back next Saturday....
You can not plan this part of your trip - you just have to turn up and hope for the best and expect the worst!
If your visa is about to expire, you can extend it in Aswan - with the reason you are waiting for the vehicle barge.
If your carnet is about to expire, go and see the guys at the port and give them some pocket money and they will turn a blind eye... or you can leave your car in the custom compound until the barge leaves.
For more information on my adventures, please visit either of the following: