There is parking at the venue and you are more than welcome to leave your car overnight and pick it up in the morning.
Will the wedding be indoors or outdoors?
The wedding and reception will be entirely outdoors and the dinner is on grass.
Where do you recommend staying?
While the wedding is in Carlsbad there are several adjacent areas that are easily accessible including Oceanside (where we will be staying), Encinitas, and San Marcos.