Advice needed

[Jock Scot]

I have to confess that I have little idea on the sort of weather you have in October,but I suppose you must be heading into some sort of cooler weather.So,no matter how casual you want to be, keeping cool/warm is a consideration.

I do think for a wedding,however casual,a bit of an effort is still appropriate.Might I suggest a white shirt,tie(not bow tie),an Argyll jacket and waistcoat(vest) and suitable kilt hose and shoes.You could forego the Argyll,if needs be, and just wear the waistcoat(vest) which is a very effective way of being casual and smart at the same time.