Take a taxi or a limo. Do you really want to drag all your baggage from the hotel to a taxi to the bus to the baht bus and on the poorly constructed sidewalks clogged with people and vendors to your Pattaya hotel? Take a taxi or limo and SAVE yourself all this aggravation. Don't be penny wise and pound foolish.
You can arrange through your Pattaya hotel for a taxi or limo to take you to the airport.