There are taxis all over property. They'll be plenty at DAK... just past the parking trams, headed towards the charter bus lot. There will be signs.
However, in the case that you cannot find a taxi, here are some hints on how to make them appear.
Just go to a pedestrian crosswalk, and attempt to cross... almost immedietly, a taxi will come flying out of nowhere and nearly run you over. Or, go to a stop sign/red light, you'll find a taxi running it. I've found these ways are failsafe ways to find a taxi.
In all seriousness though... if you are going to be taking a taxi on property... be careful, wear your seat belt, and make sure your driver drives safely. Most of them don't... but hopefully, you'll get one of the few decent drivers.