i don't know many who get married these days..
but there is a site that sells printable games
and other stuff. http://www.bridalshower.com/

one idea is to give recipe cards to guests
and have each one bring a favorite recipe
for the bride...3X5 cards could be passed out
ahead of time--there are probably a lot of good
recipes among such a group of food fans!

is there a theme or favorite color for the wedding?
there are 2 links below about bridal showers..

perhaps the guests want to camp out together,
go on a picnic or hike or have a slumber party
with teddy bears?