Using online registration and the Event Manager is an easy way to keep all reservation information in one place. There is no need for offline management when using the system in place on the website. It is also easy to communicate with attendees by using the blast email system on the website.
If an event is a recurring event, remember to use the Single Day Event but make this a Cloned Linked Group of Events. If the event is added as a Multi-Day Event, then the attendee must go to ALL events.
Customizing notifications on events is a great place to add cross marketing. This also allows for notifications to be customizable using Snippets or to add additional information that attendees may need to know.