Those are cute! Oh and I see you're getting married at DPA too, yay!
Are you putting them in your OOT bags? To be honest I'm not that sure that all your guests will remember to bring them to the reception.
I am planning on doing the maracas thing too but we're going to use them as place cards. We're going to tie a card to them. One side will have the person's name and table number and the other side will say:
"Now the party’s getting good, we’d like to hear this if we could, stand and shake with all your might, and see the groom kiss his bride tonight."
I totally got that off of someone else on this forum, but I don't remember who. Whoever it was, thank you!