Even with the oily fish and lots of water I still have crepey skin, it's genetic for me. That said, I look a million times better than I did one hundred and ten pounds ago, and younger, too.
I wouldn't personally do any anti aging treatments, but that is because I don't mind aging and am cheap. Your mileage may vary. Ian is right that simple dietary changes or additions may be of great benefit to you, whether you end up doing other treatment or not.