When you exit the airport after passing through the x-ray machine at customs you can find a variety of ATM machines outside the building (after passing through the crowd of people waiting for passengers) turn right and go around the corner at the end of the building. (opposite side of the building from the taxi line). W/D 3,900,000 or 4,400,000 to receive smaller bills. (Keep 500K notes separate from the other notes to prevent a mistake when paying bills).

I walk past the taxi cue and just look for a vinasun taxi (usually a white van with red and green writing) Walk past all the other taxi brands (don't worry, nobody will care). The vinasun taxi rep will give you a small piece of paper with the taxi number written on it if there are any problems.

The driver will pay 10,000 dong to exit the airport. Just tack this onto the fare upon arrival in D1.

No problem with late night arrival. The airport always has taxis and if you're not drunk or walking around begging to have your cell phone snatched out of your hand then safety isn't your main concern. Traffic and dehydration are by far greater dangers.

Tips aren't expected by taxis but 10-20K will mean a lot more to the driver than it will to you. (less than a buck)

With no traffic Firemansam quoted a fair price.

Don't worry if the taxi takes small dark streets they all have their favorite route to D1.

Have fun and enjoy.