Bridal Show Follow-up

I did a wedding show this weekend where I offered what I think is a lovely a raffle prize. At the bottom of the entry form I had a space where I asked people for permission to contact them in the future. I'm wondering what some of you have found is the best way to follow up with potential brides and grooms. I feel uncomfortable calling to give them a big sell; so what sorts of things should I be saying. Do people respond better to a personal telephone call or an e-mail? What are peoples experiences with following up after a bridal show? Is it OK to use raffle entries as possible leads even if it isn't the person who won the prize? I am sure the follow-up is different depending on the service provided. I'm a wedding planner of both local and destination weddings.

Thank you in advance for your answers.