I have worn a kilt on about 5 golf outings. First outing I wore a kilt with a traditional fit and found it something I had to get used to (in regards to the waist). Outings since then I have opted for a casual fitted kilt, ie; fitted with the waist at the "jeans" waist, and found this much more accommodating. Additionally the casual kilt is made with PV fabric and much cooler.

Generally, same convention would apply for the course you may be playing, shirt with collar, tucked in and wear a belt. I did not wear a sporran to golf. My golf bag seems to have a hundred pockets so the extra storage is not needed.

And surprisingly, neither kilt helped improve my game.