Activity for Ashley

What's the best way for people to RSVP? By phone or online somewhere, or email?? I don't want them to send me it via mail just in case it gets lost or I don't get it on time..

Do florist make hair bouquets? I want myself with baby's breath and my bridesmaids with green leaves in their hair with some hair twisted back.

Who sets everything up when I'm getting ready for the wedding? Do I make a map on where to place everything?

Where is a good affordable place to order invitations? Also, what information is needed on the invitation?