The idea of traditional is an illusion. If you look at the history of the kilt all these things labeled "traditional" are actually modern. Wear what is practical and that will be true traditional Scotland garb. The "traditional" kilt is a great example of this. Many consider the "8" yard knife pleated kilt to be traditional, when in fact that came about in the past 100 to 150 years. The kilt was outlawed and was only made popular again by the upper class of Scottish Lords. It became a ceremonial clothing and therefore was grande and elaborate.

Eight yards of material is not practical for hunting, farming or any other highland activity. Light and functional.

In short the "traditional" kilt is in fact modern and what is referred to as the modern "casual" kilt may in actuality be traditional. Be practical and comfortable, then you will be in the same spirit of the original kilt wearers.