We have sent out our save-the-dates for our wedding in June 2014. We plan on sending invitations to everyone who received a save-the-date, however, we are afraid some people will feel obligated to attend. How do we let our invited guest know they are invited to attend but not obligated to travel the long distance for the wedding? We just want them to know they are important to us and are welcome and no hard feelings if they cannot attend. Any advice would be greatly appreciated.