Appeals and packages can be imported together. To obtain the headers from How to import constituent appeals (includes sample data file), include the header for the Package ID (CAPPackageID)-- this is the Package ID that belongs to this Appeal. The Package must exist as part of the specified Appeal. In Import, select Constituent Appeal from the Constituent section.

The value that should be placed under the Package ID in the import file will be the Description of the Package. This can be found by looking on the Package tab within the Appeal record.