nmr - do you know how wide the indentation is? I'm guessing that your daughter will not need to hang up a lot of clothes, meaning she will have most use of the rod that is present in the indentation for something you create.
I will say that we hit up Container Store when they had their college night near us. We did buy some of those canvas organizers that basically give you more 'drawer' space.
The Container Store > Shop Closet > Hanging Bags > Natural Materials > 6-Compartment Canvas Hanging Sweater Bag. The ones we bought had the option of buying extra canvas 'drawers' that you could slide into each cell. That is particularly helpful for things like socks, underwear, etc. that would be likely to fall out of one of those cells if they're just stuffed/crammed in. I think we bought two of the canvas hanging systems and it's been very helpful. It also makes moving out and back in easier, as you're basically just taking out drawers and moving them with their contents as opposed to taking stuff out of a dresser/packing it into a box/bag/piece of luggage, then reversing the process at some other date.
I also think you will find that many kids will take season-appropriate clothes to school with them in August/September, with a couple of sweatshirts, etc. Then as the weather starts to change, they will let you know when it's time for the heavy stuff. You can either send it at that point, or take it with you when you go for a visit. If you go for a visit, you can then take back home with you things that will be considered inadequate for the colder seasons.