Specific Packages Added Automatically to Certain Membership Levels

Our highest level membership (Full Family) has come with 5 guest passes in the past. It would be great to have the ability to automatically apply certain types of packages to the purchase of a membership. This could be a way to run early bird membership specials for seasonal clubs and/or add more layers of value to the membership ladder.  Right now we have to go in and apply the complimentary package to each membership as they register.