Have you considered the weight (2.5kg or so) you would be carrying during a wedding?
A bride doesn't want more things in her hand during the busiest day of her life. Keep it to < 5 shots and use the mini format so the groom can put them in his pocket.
Think about using a Fuji Instax camera.
Any hot shoe can take a wireless trigger.
You don't say anything about your current setup.