As a female who has made frequent weekend trips from LA to Salt Lake I do not find this concerning. I usually had my backpack (I was always under the illusion that I would be a more dedicated student and work on things when I was home...for the most part not too likely)(I also always pack a change of clothes and my toothbrush/retainer in my carry-on since I'm paranoid about lost luggage), my purse (which is ginormous as we speak), and my suitcase. It was not uncommon to have running shoes, sandals, formal shoes (for going out/funerals/church etc), sandals I don't mind taking to the beach, hair dryer/curling iron/straightner, and then some clothes. I also usually brought back a few things from home that I didn't have with me or was lucky enough into getting my parents to stock up on some groceries from Costco that I could transport. I know, I overpack. But I hate the feeling of traveling and having forgotten something (my favorite hair serum that needs to be in a checked bag and not available at home) or a few clothing options depending on plans. I'm sure Kenzie had a few outfits, maybe she wasn't sure what she wanted to wear to the funeral or was unsure of what other familial activities would be happening and wanted to be prepared. It's nice to think the driver would help with luggage but we don't know that. Maybe she didn't want help because she was confident in her ability to grab her luggage herself. That's how I tend to be..