My son's girlfriend is taking this cookie platter to a girl's weekend bachelorette party. How can this be safely transported? The base cookies can be attached to the board with frosting, but we don't want the top layers to be attached to the base layer. Any thoughts?

I would assemble it on site. You can give her a copy of the photo so she will know how they are to be arranged.

It looks like there only 8 cookies that make up a 2nd layer so Sandra’s suggestion is probably good   Otherwise cover the plate very tightly w/plastic wrap.  

Thank you, ladies! I took a picture and wrapped the cookie board with Glad Press and Seal wrap. She helped me decorate these cookies and is so proud of herself. She can't wait to surprise her friends.

It is a gorgeous  display, Jocmom!  Both of you should be proud!