@saladfingers
YANBU.
My son was going to go to a uni that was 50 miles away (an hour on the train,) and at the eleventh hour, he decided to pick the same uni as his girlfriend (who he only met 6 months before he made his final choices.)
The uni SHE was going to, was 350 miles away, but it was OK for her, because her family were moving to a town only 35-40 miles away from this uni! It was a 12-13 hour round-trip, and cost about £90-£100 in petrol. To say we were pissed off is an understatement.
I wouldn't have minded AS much if he had just wanted to go to that uni because it was the best one, or the only one for 350 miles to do his course. It was the fact that he only went because his GIRLFRIEND was going. And 3 or 4 universities within 50 miles did the SAME COURSE. (So he did not NEED to go to that uni, 350 miles away!!!)
We had to take him there for the open day, and the first day he started there, then we had to run up and down for the holidays. I resented every trip there, and I let him know that, and I make no apology for it.
Not least because he and his girlfriend finished during his first term there! We asked him if he could transfer to a uni that was closer, but he said 'I'm here now, I may as well stay!'
It's all very well saying 'I'd do anything for my child, and if you loved yours you would do the same!' But it's not always as cut and dried as that. When your child picks a uni that is a 700 mile round-trip, and costs £90-100 in petrol each time, that takes a day's holiday leave off you, (sometimes 2,) and often results in additional costs for staying overnight, you have a right to be pissed off. Especially when the course is at a uni much closer. So the 'I love my child more than you because I will go to the ends of the earth, and wait on them hand and foot' brigade can bore off. 
I am gobsmacked at how easy people are finding it to suggest the OP just stays overnight, and books a hotel etc..... Never mind about the additional costs of the hotel room (which, even in a Premier Inn or Travelodge could be £50 to £65 for the night,) and the one or two days she would have to book off work, in ADDITION to the petrol money, car park charges, food etc...
I swear some people live on another planet. 
OP, you need to get your ADULT child to arrange for storage. She is taking you for a mug expecting you to fetch the stuff for her, when her uni is so far away!