All my Goldens were spayed before the first heat and never had any problems with skin or coat. They all recovered very quickly once they got over the effect of the anesthesia and were able to come upstairs on their own. Just keep an eye on her and make sure she doesn't lick the wound.
Hope your experience is as good as mine was with this operation.
Good luck and many kisses to lovely Cookie.
Let us know how she's doing.