How do you organise transport for the wedding?

We are looking at hiring a car for our wedding, we're quite confused on the hours we may need it for. We will all be getting ready at the same hotel, the guys will be leaving before the girls. Do I hire 1 car (limo) to take the guys and then wait for it to come back and pick us up and take us? Our ceremony and reception is at the same venue as well so we don't need a car once we have all been dropped off. Can we add on a price to the end to take just the bride and groom back to the hotel?