Ok I am going to go against the grain here... You first state you are a president of a veterans organization, and a donator and finally you mention you are a reservist. Under that guise alone, I would think the kilt, jacket, and a regimental tie would be in order. You are showing your military service without being to obvious.

Good on you for supporting the Veterans, by taking an active role in a Veterans organization, for supporting the Active Duty Service Members. And Thank You for your service!