Designing your company
The key to a successful transition is to start building a solid foundation right from the start. Don't make the mistake of designing your company to be dependent upon you to take this approach and your company will be doomed from the moment you step out the door. Instead, try to work towards implementing clear systems that someone else will be able to seamlessly step into and follow. That way, when you exit, your company will be able to function just fine in your absence.
If you are currently not taking event company registrations online, you might want to look at the data. Giving prospective attendees an easy way to register may just increase attendance.