Dedicated garment bags and other suit-specific packing implements are mostly superfluous.
My suits and sportcoats that are worsted wool, flannel wool, cotton, linen, cotton-linen, tweeds, silk blends, all different weights and weaves... I just pack em normally and they never wrinkle unduly.
Trousers are trousers - 2 folds like any other pants.
Jackets - I like to invert 1 sleeve, and slide that sleeve into the other. Then fold jacket length wise.
But really you can do any which way you want. So long as you arent compressing everything to an inch of its life, its not going to crease. Worst case scenario, wools will breathe and "relax" if introduced to some steam