I haven't been around for ages and ages so I apologise for barging back in with a plea for help 
(All this assumes ds manages to go to his firm choice, but I guess it would come up anywhere.)
Our plan for moving him in (as his preferred uni is quite far away from us), is for me, dh and ds to drive up on the Friday, move him in at some point over the weekend, and leave uni city on the Sunday. He has a long term (coming up to 2 years) serious girlfriend who spends a lot of time here, and is hoping to have a gap year.
She mentioned the other day that she was planning to drive up on the Saturday and stay for I don't know how long. I spluttered something about how she wouldn't want to do that or she'd get roped into unpacking for him, and he needed to make some friends, and then the subject was changed.
This is a terrible plan, isn't it?!? She can't be there on his first night in his flat, and for freshers week. She's just left, so I have today and tomorrow to talk to him about it - any suggestions as to how to sound nice and not insane - I worry that as I think this is so wrong I will just veer into screeching WTF???