Outdoor Wedding

I am getting married September 30 of 2006 and the ceremony is going to be held outside in one of my fiances realatives yards, the yard is quite big and we are meeting under two trees, but my dress is also very fluffly and I need to find a way so my dress will not over power the whole thing and my reception will be held at one of my realatives yards it isnt going to be a sit down dinner or anything it is just going to be finger foods and people will be walking around and so on but i have no idea how to decorate so my dress is not over powering