Do any of you do casual kilt or full dress?

[The Q]

It's funny to see movies like Braveheart etc that show people in kilts riding horses- wasn't done AFAIK.

Half the Highlanders in the old days wore kilts, half wore trews, and it would be the trews for horseback.

In the Highland regiments, throughout the period when Officers were on horseback for active service, they wore riding breeches, not kilts, when mounted.

I would Not be so sure of that , in the areas of the highlands that the Kilt was the way of dress, would you go home to change to trews if you didn't have any? You may have a horse (more likely a pony) to get around if that was your need, but would you wear a different style of dress to everyone else? The wearing of trews in the Army is not relevant to civilian life. After the 45 yes you would wear trousers as travelling on Horse back would put you in danger of meeting those who would not approve of a kilt.
But between 1500 and 1747 only the rich would have had different sets of clothing for horse riding ( and being painted in them)

[OC Richard]

I would Not be so sure of that, in the areas of the highlands that the Kilt was the way of dress

That's the thing: the kilt never was THE way of dress, only A way of dress.

From what little evidence there is, kilts and trews seem to have been equally popular, and not mutually exclusive. That is, the kilt was originally just the "mantle" wrapped around the waist. With trews the same mantle was wrapped around the torso instead.

Trews are arguably the more ancient Celtic costume, dating back to Roman times at least.

Mounted people were usually people with money. The could afford various outfits.

[Martin Septim]

I've never had the opportunity to dress formally while kilted, so I've only gone casual, wearing a Blackwatch sport kilt, boots, hose, sporran, and usually a white button down shirt.