If you go to
www.seaworld.com and act like your going to buy tickets, you get get a list of all the discounts that annual passes offer. It looks like it is $8 off each ticket for whatever park you have a membership for (it used to be a %).
If you go online and log in to the passholder section you can buy advanced tickets for friend and family for 39.95 plus tax each. They are the printable kind.
Copy of the SW/BG silver and gold benefits:
SeaWorld Orlando & Busch Gardens Tampa Bay Silver Passport
Busch Gardens Tampa Bay, SeaWorld Orlando and Adventure Island Gold and Silver members currently receive the following benefits:
Free General Parking (for Senior and Adult Passport members only, not valid with children's membership)
$8 off admission for accompanying visiting friends and relatives (up to six people on date of visit)
50% off one-day single-park admission for Passport member only to all other Anheuser-Busch Adventure Parks outside Florida (SeaWorld San Antonio, SeaWorld San Diego, Busch Gardens Williamsburg, Water Country USA and Sesame Place).
10% off merchandise at all Anheuser-Busch Adventure Parks gift shops (restrictions apply)
10% off food at all Anheuser-Busch Adventure Parks (excluding Luau and stadium purchases)
Passport member Special Events membership Newsletter
*These benefits apply to Silver and Gold Passport members only. Passports valid only at park of membership unless otherwise specified. Some special events not included.