Confused about end of wedding reception - Do I leave wearing my wedding dress?

So I have a big poofy dress and I won't be having a limo. What I'm doing is driving to the church early to take pictures before the ceremony and put my dress on there. My reception is right after and only about 30 yards away from the chapel so I'll be walking there. But at the end of the night when we leave do I just try to fit in our car with my wedding dress on? Or do I bring something to change into and leave it with my mom or something? Thanks for your help!