May I just say once again how much I lovely you all? 
To maintain some semblance of anonymity, I won't put the actual date of the wedding, but suffice to say it's soon. I'm none the wiser as to who (if anyone) she has got to decorate now, but you're all quite right in saying that that kind of theme needs some planning. Tbf, she may well have planned it, just not got anyone to actually execute said plan!