I'd wait until you're sure she's actually broody before crating.As I said she was laying yesterday so I don't want to put her in the crate yet plus the others haven't laid yet so I can't lock the coop, so at the moment I'm a bit betwixt.
Some birds like to 'lounge' in the nests, before and after laying...especially if they are going into or out of lay.
These are the signs I go by....
Is she on nest most the day and all night?
When you pull her out of nest and put her on the ground, does she flatten right back out into a fluffy screeching pancake?
Does she walk around making a low cluckcluckcluckcluckcluck(ticking bomb) sound on her way back to the nest?
....I've had enough broodies that I know that clucking before they start sitting, but I still wait until I'm sure.