Also, in answer to your freezing question, yes, I do it all the time.
You can bag them individually, even to the point of putting ribbon and/or card toppers on them, put in a container, and freeze. I have kept them for up to a month. Be sure your ri details are dry before bagging.
You can also layer them between wax paper, put in a container and freeze, if you aren't ready to bag them. Let them sit on the counter, in the container to thaw, it doesn't take very long.