Indesign is good for setup layouts, but Illustrator would probably be the best way to go for Wedding invitations. I think of Indesign as (which it is mainly) document set up. Like if you had a list of invitations and wanted specific tables, and maybe a picture or that. Or... what do they call it, a lot of persons were using it last year at my school for a scholarship. It had to be a portfolio of works they had done - e.g Journalism, Theatre, Encore, etc. stuff like that. - Indesign is layout, Illustrator is good for basically everything.