Parking garage is actually part of the building from which you will be embarking the ship. Dunno from which direction you will be traveling, but if coming from the west (MS, LA, etc), follow I 10 to the Canal St exit, go to the bottom of the ramp to the light and turn right; stay in the right lane. You will have already spotted the ship long before the ramp, but simply follow the traffic officers' directions and into the terminal. Porters will be waiting for your luggage. After dropping off your check-ins, simply drive thru and to the left, up the ramp and into the parking garage (fee of $12 per day in advance, cash or credit card). After parking, take the elevator down to the ground floor, and you will be directed to the check in area. Boarding usually begins around 11:30 AM. Have a great cruise, and welcome to Mobile!