Of course Jock's advice is good advice, but I wonder if this might be one (OR TWO) time(s) when a little something over the top is acceptable- the Father of the Bride, even a surrogate father of the bride, is entitled to be very dressed up and might even be able to carry off being overdressed for a daytime wedding, i.e., wearing the great whacking plaid and all of that. The trick is, for that third wedding (where you will be an ordinary guest), to show just how understated a gentleman in a kilt can be.

Ummm Paul, were you in that picture? I saw a lady and then didn't notice what else was there.