Weddingbee boards

I've always wanted an outdoor ceremony. I envisioned giant trees hanging down all around the area...but the place we're using ( http://www.wedgewoodbanquet.com/gilroy/weddinggallery/index.html ) is at a golf course on a little hill. We can't use the actual course because the golfers don't leave until sunset. The ceremony place is near the club house on a little hill and there are pretty much no trees anywhere near it. I'm not crazy about the bare, lack of shade, open feel. I need suggestions on how I can spice it up. I think my aisle decorations will be pomander balls on shepherd's hooks. I'll either use a gazebo or an arch and whichever one will have some sort of floral arrangement on it. But how else can I add to the site and give it a more beautiful look. Can you rent trees? lol