You may look into local universities Chapels. Typically these are the school's non-denominational public facilities that are used on weekends for weddings. I've shot weddings in them before and they just cycle weddings through (in season) on a pretty tight schedule. You could simply "invite" yourself to stay at one for the day and witness several weddings and observe how the photographers work. Simply be courteous and stay out of their way. Witnessing serveral photographers and their work style is helpful but realize it's no substitute for real world experience. Good luck.