Adoption finalization party

We will finalize DD's adoption on Sept. 11th. We plan to have a party with our family and friends to celebrate at a local park. I am having trouble coming up with the wording for the invitations. I have something like this "Please help us celebrate our joy in becoming DD's legal parents" This sounds just a little too clinical for me. I also don't want people to bring gifts. Everyone was so incredibly generous when she was born. I know that it is not appropriate to put "no gifts please" on the invitations, but I don't know how else to get the point across. Did anyone do anything similar? Do you have a better way to word the invitations? thanks! Beth