Wedding cards should match and have the same design of your wedding theme. The modern and sophisticated way to write the wedding invites is to use a love poem, wedding verse or write something that will match the wedding theme.
Of course, the reason why you would like your memories to be mounted to a scrapbook instead of a photo album, is because you would like it to be special as much as possible. When you create a scrapbook of your own, you do not have limitations in adding as much creativity as you want, unlike photo albums, you are entailed to use only the spaces that are allotted for pictures. And since photo albums are ready made, it's difficult to make a personal touch for your own preference.