I made 600 chocolate covered oreos for my son's wedding last October. I started about two weeks ahead of time. I understand about having one less thing to do. I had them packaged two to a box. The two were in a cellophane bag. Worked out well, and they were a big hit. Cleaning up at the end of the reception, there were none left. That was a good feeling knowing they were well received and I got a lot of compliments. I got a lot of enjoyment making them.
How many are you doing? I work full time, so in the evenings I'd make a about 4 dozen, then the next night, I'd bag and box them. Really once the cookie is covered in chocolate they will keep for a long time.