In terms of marriage, Islam has spoken much. From the moment of searching the criteria of a potential companion of life, to how to interact with him when officially became a heart conditioner.
Islam provides guidance, as well as Islam directing how the guides organize a wedding party is fun, but still get a blessing and do not disregard the sunnah of the Prophet sallallaahu 'alaihi wasallam.
Similarly, a simple marriage but still there is its own charm. So Islam teaches it.