Activity for Alyson

What is the etiquette on evites? I really want to use an electronic invitation because of how easy they are .. I was wondering if anyone has used them for their wedding or do you think they are too informal for a wedding..

Hey guys! I really need some help. So, my Sister-in-law has offered her backyard to us for our wedding. Their backyard is a nice size for a small, intimate wedding but I am having second thoughts about having it in her backyard. A little back story...