FI and I are having a very small wedding (35 people total, including the two of us and our small wedding party) Our invitations are DIY and sweet but informal, informal wording, and the wedding is at our local VFW. It is insanely tacky to ask guests to RSVP via phone or email, or do I absolutely positively need to do RSVP cards? I am on an invisible budget (ie, NO money) but I don't want to have people think I am being tacky and crude. My parents can't come, and honestly I think they are the only ones who would be offended by a phone/email RSVP. Thoughts?