St Joseph’s Cathedral has some limited car parking on the surrounding streets, but none directly on site, so be prepared to walk approximately 10 minutes if you decide to drive.

Here's the church 

Yes, plenty.

Here's the venue

Yes, you have to RSVP for each person addressed on the invitation. The RSVP responses will go into a spread sheet and the spreadsheet is sent off to the caterers and planners to account for accurate guest numbers.