Have a May wedding and make your RSVP date by 4/15??
Fiance is a CPA and I'm halfway there, we put please RSVP by 4/15 for our 5/4 wedding for giggles (and for the giggles of all our invited accountant friends).
Also, bless your stressed heart if you are currently going through busy season and planning a wedding at the same time! I would die. Which is why I left public accounting a year+ ago.