When to send Thank you notes

So we have had a few guests buy us some gifts off our registry when they RSVPd. I’m usually the type to send out a thank you note ASAP, but I initially wanted to send out a thank you card with a photo of us from the wedding on it which obviously can’t happen until the wedding happens.


Should I wait and send all the thank you notes after the wedding? Or should I still send the guests that have already bought us gifts a thank you note now even though it will be a bit more of a generic card than the photo ones?