I will also plan to leave around 1pm...May be we can meet somewhere and i will follow you since i am not aware about the location..
The location is easy to find, there is a fairly big sign board that identifies the airport... you need to make a right while going from the golf club towards Al Khor. It is after Simaisma, about 10 km before you reach AlKhor.
This used to be the official RC field before.