We are on the QM2 right now with an arrival in Brooklyn tomorrow.  The motor coach transfer from the ship to LGA costs $60 per person and leaves at 8:15 AM.  The latest one can disembark is 10:00.  In the past availability of taxis at the Red Hook terminal has been sketchy;  sometimes there have been several and other times none at all.  Calling Uber or Lift may be your best option.  I will try to send more info on the taxi situation after we disembark tomorrow.   So this morning at 10