For many, many years I have done similar.
I found you can use almost *any* cookie.....vanilla wafers works well. Another dipping possibility that people just love is Ritz crackers! Sometimes I double dipped them, 1st in mint (green) choco (make the choco extra thin for this layer), then in choco; even white choco.
Arrange them on a 1/4 sheet board - as I remember 12 per board - in a tree form (10 round ones & two for a trunk). The trunk of the tree can be a Waverly or graham cracker.
It's been yrs since I sold any of these arrangements but back then I was getting $6 a 'tree'.