The only suggestion I could add to these is to put some foam over the cams. I have shipped and received a few bows now, some right from the factory, and there is only a plastic bag around the bow in the box. The only xtra I do is the foam over the cams and wheels for a precaution.

I also make my own boxes if I don't have one. I cut down an appliance box and use a blunt tool to score the cardboard and a straight edge to make the corners bend nicely, then a little elmers glue and tape then your done. These boxes are better than the ones the bows are originally shipped in, a stiffer cardboard and built to size. I have even shipped an elk shed in a homemade job, worked out great and I kept it within the shipping measurements.