Some things to consider for an outdoor affair:
• String up strands of white lights for soft, subtle lighting inside the tent or around the perimeter of the reception area.
• Use seasonal flower centerpieces on the guest tables. Along with roses, summer blossoms include buttercups, daisies, lupine and peonies.
• Serve a buffet that mixes hot and cold items. Incorporate seasonal fruits and vegetables, such as strawberries and baby peas along with summery entrées, such as Chicken Picatta or sautéed lemon haddock fillet.
• Add weights to all table linens if the reception is outdoors. Nothing will ruin a wedding faster than tablecloths blowing away. Linen weights are available at most party supply stores.Source: www.ehow.com