I ended up building a box out of timber from bunnings to sit on top of the brood box.
Hopefully this will provide a bit more incentive for them to head inside tonight. If not Ill make a nuc as you say Oz, I honestly didn't think of that, I have 2 nuc sized swarm traps out in the garage and 4 frames with foundation so if they are still hanging out front tomorrow Ill give that a go.
They will only be staying here a couple of days anyway, Ill take them out to our farm Thursday or Friday, Just worried about them absconding in the mean time.
They are currently bearding below the entrance to the hive. The hive is about 2 meters up on a shade structure above our dining room window. I keep hives up there when they are here as we have a small yard and nosey dogs :-D
Here is a picture looking up through the window to the shade structure:
What do you think, should I worry?