Mother's Day photobooth backdrop

A couple of my good friends are pastors at a local church. They're setting up a photobooth this Sunday so that families can get a sweet little family photo. Katie asked me to help plan and install a floral backdrop that looks creative and colorful without being too wild. 

Here's my test install in the laundry room! 

I'll be installing on Saturday so I'm drying the flowers and foliage beforehand.