In the time that we've been serving as Ward Missionaries, we've attended all 3 convert baptisms (along with our children). I've noticed that the same few people attend, and that (aside from relatives) the people who are attending are generally there on assignment. There is always a representative from the Bishopric, Relief Society, Stake Presidency, etc., which is great (don't get me wrong!), but I'm sort of sad that more members don't come to support the new converts.
We've been trying to brainstorm some ideas for increasing member attendance at convert baptisms. The baptisms are already announced in Sacrament meeting, Relief Society, and Elders Quorum. I also send out reminder emails (to everyone whose email I have) in the ward. So I don't really think that its that the Ward members don't know about the baptisms. I've also mentioned this in ward mission correlation (that a member of the EQ and RS presidencies attend), but didn't have a real idea - of course, I recognize that sometimes people are just busy with other things. I just think its a missed opportunity for members to show support and friendship a new member AND a spiritual experience that would be beneficial for everyone in the family.
The only thing we've come up with so far is trying to encourage the full-time missionaries to include more members in the baptismal program. I've also considered making simple invitations to put on the RS display table the Sunday before a baptism (baptisms here are always on Saturday). Any suggestions?