None of the loops on my Bear kilts were big enough for a Kilt belt and my traditional doesn't have any loops. I always (after some good advise from Todd and Hamish) just wore the belt over the kilt. I never had any issue with the belt moving out of place.

I have found that the kilts that sit on the hips often need a belt to help out, where as a traditional kilt seems to sit just fine without a belt.