I am making my own invitations, and I am stuck on the response cards. Do I do the traditional snail-mail response cards enclosed in the invitation, or do I do the more modern phone/e-mail RSVP? I like the fact that the call/e-mail is more environmentally friendly than the response card, but it might be easier to mark a card and stick it in the mail than write an e-mail explaining why they might not be able to make it. Some friends suggested having the option to choose from both, but that would be confusing on my part and would be a waste of postage for some.
Which should I choose?