Congratulations to your Son, and to you for raising an Eagle.

I'll agree on the Tartan topic. As I understand it, that is solely a Wood Badge honor. But with thousands of tartans out there, surely there is another that would work

Is your Troop open to a kilt being worn at the ceremony? Otherwise, you'll also have to be ready to address the debate about what is and is not an authorized Boy Scouts of America uniform. Depending on your, your Troops, Your Councils, and the Boy Scouts enforcement of the regs.