Boy, that's a tuff one. Most leather is "rolled" to avoid folds,
Yes wetting, (SprayBottle) will help with the shape but if it's been down for a longtime you'll still see some marks/wrinkles.
Thing is, maybe you'll be the only one to see it, maybe you can encorperate some of the folds into the shape of the bag, ya know?
Kinda use the stuff like it is,,or is it folded way small?