Thanks for your input, everyone! She has been in an apartment for 3 years, so things have accumulated. Some things aren't that easy to ship by mail; for instance, she has a big trunk. I'm unsure about finding "shipping companies" vs. "moving companies" - just not sure what the difference is.
And, I was not going to let her drive home by herself! Originally I was going to go out there and help her pack up and put stuff in a rented van and we were going to drive back together. It was my husband who suggested having the stuff shipped and save ourselves that journey.
Recommendations for trustworthy shipping companies?