Sun's experience with real-world migrations has shown that once you have completed all the necessary upfront planning, analysis, and configuration, a migration does not need to be carried out by the most technical of a company's support personnel. With a minimum of training, your operators should be able to accomplish the actual migration steps. In practice, where you should spend time to smooth the migration is by:
Preparing email to end users and an intranet page explaining more details on the migration
Sending notifications to end users when their migration will occur
Validating the migration, once it is completed, and analyzing post-mortem issues, if any (usually this just involves reassuring users that their data is there)