George let Fred head to the back before he did, staying out in the shopfront and showing off a few products, letting a few wandering firsties try their testers for the shite that was less expensive to make. Mostly just to distract from the the people vanishing into the back. He kept an eye on Verity, making sure she wasn't getting overwhelmed or anything - though she was usually better at the bloody counter than he was anyway.
Finally though, the shop had thinned out a bit, and most people who were going to show were there, so he ducked into the back room too.
He caught Fred's eye for a second, but his twin was talking to Neville - who looked like he might sick up at any moment. If he did, Fred was cleaning it up.
George left them to it, standing by the door so he could peek out to check for more and waiting for everyone to settle. He already knew everything that was going to be said, he figured. But you never knew. Harry, Hermione, and his little brother were secretive little prats, sometimes.