Weddingbee boards

You could do a "Regrets Only" type of RSVP, where they only call or email (or go to your website, I think email would be easier to keep track of) if they're not coming. Otherwise, you assume they are. And since it's all family, you can be a little less formal this way. I would write something like this, keep it simple or you'll confuse people:

"Regrets only by May 15th: Please call Jane at (123) 456-7890 or email at JaneDoe@gmail.com."

Or some websites have an RSVP feature built in, so you can add something like, "or let us know on our website at www.JaneandJack.com!"

I agree with caliocteach's wording.  If you just have your website and phone number for people to RSVP to, and don't include a pre-stamped envelope or anything to return, they will figure out that they need to call you or go to the website.

I think it's perfectly fine to do it this way, and not have the traditional mail-back response card, especially given your destination circumstances and if you're only mailing invititations to small group of family.

Now if you're sending out a lot of invitations, but only expecting family to attend, I'd rethink having 100 people call you with their RSVPs!

i think calling or online is fine... we did postcard rsvps with the option of online rsvp. so far we have a few who sent back the postcard, a few who rsvp'd online, and one who have called my mom (hmm, that wasnt an option!). we didnt even have a pin # for the website and it is SUPER clear & easy, & even a 20-something (aka super websavvy) is giving us his meal info over the phone, so you definitely should have a phone option.