Casual pleats are fine. I sit for a living as a therapist and living 135 miles from any city of size long drives are common. I find what wrinkles do develop in the casual model pleats don't show to the casaual observer, not as bad as cotton/poly pleat creases.

Of course what creases may develop easily steam out with a hand steamer or hanging in the bathroom near the shower when someone is showering. Wool steams out the easiest. Polyviscose the next easiest. After that it can be a chore for other fabrics. Just my experience.

Don't ever wear kilts when lounging around at home...choose the comfort of what the Creator gave me....so can't answer that question.

Ron