How many driver do you have Daniel, if more than 1 then why not have an 8/9 seater and a compact car or a smaller one. With the planning to do for the wedding , picking up license from Courthouse etc (not to mention alone time after the wedding) I would think there will be times when it will be appreciated if the party can split.

If some want to go to a park etc whilst you are getting prepared it then means you dont have to run round like a shuttle. Of course if there is only one driver then that isnt an option.