I would think saran wrap would actually do more harm, especially if they are not fully cured - there would be no where for the water to go!
Although I'm just speculating... I guess I could experiment on my latest batches, but I'm too stingy
I typically wait until the last minute before wrapping it.
For me I like a 1.25 inch wide band around the soap, and then I put a label on it.
It takes a lot less time compared to other wrapping methods and paper is biodegradeable (compared to plastic saran wrap) so there's that as well!