Highland gent in belted plaid:



Lowland gent in doublet and hose:



Plainer fabrics as you go down the socio-economic ladder. When it's hot I go as a poor clansman:



Belted plaid ("great kilt") is the only form of kilt that was worn in the period (but NOT by lowlanders, who despised the "wild" highlanders at the time!).

Or, simply chuck authenticity and dress for fun - which is the more common practice at Faire, anyways...!