The reason email marketing is works so well is because it's the ultimate social marketing tool. If families don't know you, don't like, and don't trust you, they're not sending their kid to your camp, period. You might be in love with Facebook, Twitter, and Linked In, but none of these can touch email marketing's ability to build those critical relationships with customers and prospects you need for more enrollment.
Know what else I love about email marketing? You can send emails on your own schedule whenever you want, and recipients can open, read and respond to your emails on their own time whenever they want. In this sense you're not pushing your marketing at them...your marketing is less intrusive. If you give people an option as to when to view and respond to your marketing messages, you're way ahead of the game.
If you don't market your camp with email, now is a good time to start.