My lovely wife and I have been invited to a charity dinner-dance in Philadlephia next ,onth. The dress code for men is "smart casual." I have been requested to wear a kilt and am planning on wearing my USAK Warrior (mainly purple) or USAK Albannach (mainly blue). I do not have a waistcoat or kilt jacket. Two quick questions:

1. Would it be approriate to wear a tweed sportcoat with either kilt, and what color hose would be recommended? I don't have the funds for a new jacket

2. What in all that is holy is "smart casual"? I checked the photos from last year and it appeared most men were wearing sportcoats and open collars, no ties, but I'm not sure how that applies to kilted wear.

Any suggestions would be appreciated!