Gender reveal help

This is our third and last baby. We didn't find out gender with our first until birth and second was during covid and we did it in a private moment with my mom.

We are going to do a sneak peak this time and it will be on the day of our blessing of our marriage and vow renewal in our church and the baptism of our two boys.

I need some ideas for announcement of baby and do a surprise gender reveal with our families together. No one knows I'm pregnant. Thanks!