Linda,
If your daughter doesn't already know, make sure she can prepare basic meals and clean up after herself. Since she is the oldest of 4, she will probably do fine.
Also, make sure your daughter knows how to handle credit cards. I had a roommate who thought credit cards were like student loans - you don't have to make payments until you graduate. She destroyed her credit record and was swallowed in debt because no one explained to her how they work.
Adult stranger danger talks would be appropriate. The situations are different as an adult living on your own, and hopefully her college will have a police officer or campus security talk to everyone, but there are no guarantees, so you need to do it.
You also need to sit down and lay out some ground rules so there aren't unmet or unrealistic expectations. How much are you helping financially? Who will pay for what? What if she runs out of money at school or gets in over her head with credit card debt? How often will she come back to visit and who will take care of transportation costs? When she comes back, how will the house rules change? Will she still have a curfew? - Make sure you and your hubby are on the same page with all of this before you talk to her about it.
Some of my roommates had parents who liked to stock the fridge for them at the beginning of the semester. It was a generous gesture. If you will be driving her to school, you may want to take a week to stay and see some sights. It may make the transition easier to have you around, but not, for a few days.
I had some roommates who seriously struggled with home sickness. Can I say that the worst thing to do is fly them home all the time or fly out there all the time. They need to learn their independence. Love them, support them, but don't bail them out of learning to become an adult.
Good luck,
S.