@BiancaBlank if there any way you could just stay the night (at O or C - not sure which she's at) before your DD's official moving in slot the following day? DD could then attend the Freshers' Events during the next day and there's a chance you might be able to start delivering her belongings to her college room the day before. It seems really unfair that she's due to miss out the dinner and events just because they gave her a late arrival slot.
I think it all depends on which college but from my experience, if you just turn up at the 'wrong' time for drop off, the college usually lets you proceed, especially if you say you've been driving for several hours but had overestimated the journey time. Another possibility would be to find somewhere to park in the town, even on the outskirts and see if you can get at least some of your DDs luggage into her college, on foot via a short taxi ride.
When I was delivering DS1 to C and DS2 to O, we rarely made the official drop off slot and it was always OK but their colleges weren't all that central.
With the Freshers' timetable, your DD can be selective in what she attends and not expect to go to everything, especially if she's someone who doesn't enjoy tons of socialising.
Good luck to all those delivering DCs to O and C in the next few days.
@EducatingSillySausages what a fantastic experience for your DC studying Fine Art at Oxford. It's over four decades since I left and wasn't studying art but did spend a lot of my extracurricular time at the Ruskin, doing art classes for pleasure alongside a very different academic subject degree. It was my sanctuary away from my own department/ faculty and I hope your DC has a brilliant time there.