Traditional advice would say to arrive 30 minutes before the start, but we would recommend at least a 10 minutes earlier. The wedding is taking place on a private seminary and there is only one exit/entrance. You'll have to check in at the guardhouse and it will take a few minutes to get in, especially with the line of cars driving on.
The driver will need to have their driver's license and their invitation with them, on hand. This will expedite the process of entry,
Plenty!