It doesn't really matter what direction you come into Universal from you will see signs for Buses/taxis/passenger dropoff. You drive in and drop them off at an escalator that takes them right up to the entrance to City Walk and the parks. It's very convenient, not at all difficult to find. If all you are used to is driving around the WDW property this is much smaller and much more difficult to get lost in. Tell your family to have a great day at US/IOA.
PS: If you follow the signs for parking and see all the attendants you are going to the wrong place. Just tell the parking attendant you are looking for passenger dropoff and they will point you in the right direction.