Okay, I'm sorry but I didn't know where else to pose this question!

This is a bit lengthy and I'm sorry.
First of all, we had a rather large rift in my family that split my Dad's side pretty much in half for nearly 30 years. That said, the differences are starting to be worked out and the family is coming together again. My Fiance and I are having a private wedding next week with only our parents and siblings in attendance, but we are sending out Announcements of our wedding so that the rest of the family knows that we got married. On the back of the announcement I included a brief note stating that the Reception will be in Spring 2014 with the formal invite to follow. (I have a few relatives who will be upset at not being invited to the ceremony and might get feelings hurt if they weren't aware that a reception was to come.)
Now, I don't know the separated part of the family that well at all-- in fact, I haven't even met some of them. BUT, we are having a very low-key reception and we would really like to invite them to celebrate with us. Maybe we could even start to mend a few more fences.
So here is my question. The family split over something really stupid and trivial. I would like to include a note to the separated family members of Please no gifts, only your Presence. My family is extremely traditional and I don't want them to think that my invite is just a gift grab, I really want to help heal the family rift! Should I include that note with the first round of Wedding Announcements or wait and include it with the Reception Invites?
I don't want to sound snotty to anyone, the rest of our family already *knows* that we aren't looking for gifts. I just don't know these people that well and don't want to step on any fragile toes. Can anyone advise me on how to handle this?