If anyone needs to fit a lot of stuff in the car for college drop-off, I had a good experience with some Wal-mart items. I drove D17 from Ga to NY two years ago and we fit everything in my fairly small Rav4. For me, since I was doing it myself and I knew I would be tired and stressed once we arrived, I did not want to buy much once we got there. I didn’t want to have to trudge all over town looking for things that might have been picked over and not what we wanted (I do like the idea of ordering ahead of time though). Of course I did a Target trip the night after move in for a few extra things, but most of the things were packed tightly in the car. I got a pretty inexpensive soft but waterproof rooftop carrier and all the bedding, towels, pillows etc. fit in there. I also got a couple of those extra large plastic bags that could be vacuum sealed and that made packing the bedding and towels much easier. We did the trick with the hanging clothes and stacked them and put in sections in trash bags.
FYI, I ended up returning the bed risers I bought because the beds had a lofting mechanism already. Also, both kids’ schools have beds that don’t require XL sheets.