Limos - Pick Up / Drop Off

My ceremony & reception are at the same location, so all I will need is a pick up and drop off. I am thinking of having an 8 person limo pick up myself, my parents and the 3 BMs up, drop us off at the site, then go to pick up the groom, his parents and the 3 GM. Has anyone done this? Who sdid you use? What is a decent price? I am sure they will not charge for the whole 3hr wedding package. Any info would be helpful. Thanks!!