I am making my own invites for my wedding. I am using brown packaging paper from walmart and cardstock paper from another source. I need to glue the packaging paper and the cardstock together, what would be the best glue for this? I am also using the packaging paper to make envelopes for the invites, will need to know what would be the best glue for this too. I would just use staples for the invites but I heard you can not mail it with staples?