Huge family here, which actually is one of the things that made a DW more desireable. We made the decision to invite immediate family (siblings, parents, grandparents, first aunts/uncles/cousins) and a few very close friends. This firm cutoff on the family side allowed us to avoid hurting feelings and angering people by inviting some distant relatives and not others, which seems to happen to my other relatives when they plan weddings back at home. We have a few aunts/uncles that will get invites that we aren't super close with, but don't worry about them deciding to come anyway.