TxDoc gives some good advice, but I got the impression that this ride was a "newbie" ride. As such, I'd be really surprised if you rode in a tight paceline.

In any event, I agree that you and your husband can practice on your own to get used to riding in one. I, personally, wouldn't ride in a paceline with new riders. Having seen a lot of foolishness on group rides, I'm of the mind that new riders shouldn't get in a paceline of any significant size if they're otherwise not used to riding around people and/or don't know the dos and don'ts of riding in a paceline.