Your best hassle free way to get to Seaworld would be to schedule a car service from the web or pick up a Mears taxi at the resort and return in a Mears taxi from Seaworld. A meter rate (taxi) from the Poly will run you close to 35.00 each way. A more luxurious car service will probably charge you$70.00 to $80.00 round trip. With a taxi you can go and come at your pleasure and with a car service you schedule a time to meet the car service at the resort and at SeaWorld. You can find passenger capacity of up to 10 persons, normally on those rates. Some will charge you more if you have a more than 4 or 5 passengers.