I guess it depends on whether you’re moving location during the wedding…
We are staying at the place the night before as it’s a 5 hour drive from home, so no cars for us as it’s all in the one place (although my fiancé is talking about hiring a fancy car to travel in

). If it’s all at one place I probably would only get the one car for you to arrive in. If there’s travel involved, I’d get 2 - so you can travel with your husband and bridesmaid/groomsmen can travel separately? That’s fairly normal for weddings we’ve been to in Ireland which often seem to involve driving half way across the country