I am recently engaged and have been reading magazines and advice columns like crazy. The mention of "welcome gift bags" for out of town guests keeps popping up, but I am confused about them. When did these become the norm? ARE they the norm? What is put in them? Are they optional (I hope so.)? I have lots of family and a few friends from out of town I expect will be attending. But I also have been to numeous out of town weddings and never received a welcome gift bag. Can someone please fill me in?