Eh id rather try to sell prints since my family owns a printing company. I dont like the idea of the client most likely sharing the gallery and having guests at the event download the images. I charge for downloads and have had guests from weddings buy prints from me so I really think this takes extra money from people.
Also zenfolio give the ability to enable free downloads so if I ever want to give up on prints ill just use what I already pay for.
Also another thing about prints is they have to be able to see it and hold it to want to buy it so keep several samples in your studio.