Our backyard wedding turned out great! We had it up at the lake (Isle, MN).
For photo purposes, we only opted for tents if it rained...and it didn't!
at night time, we hung twinkle white lights so that it would cast a glow (and keep the bugs in the air!)
Check out photos of how we did ithere:
http://blog.lingfoto.com/2010/07/29/jill-matt-wedding-day/ 