I am 34 and still can't sleep when my husband is out of town. I hate to be alone at night. It calls for a different approach than when they are little, in my opinion.
I would sit down with her and create a plan together. Explain that you want your daughter to feel safe and comfortable in her own room & bed.
Talk to her about what happened at the hotel. If she cannot seem to work through her feelings, you may want to get her some professional help. It probably won't take more than a few sessions and many insurances will cover them, if not 100%, at least with a copay.
Brainstorm what you can do to help her feel safe at night.
It may include walking with her around the house and locking every window and door. It may include calling Brinks or ADT and installing a system. (If you can't afford the system, get your hands on the stickers and yard signs. That is generally enough of a deterant that a robber will not bother and go find someone else.) She may need the lights on, music on, doors open, etc.
If you are religious people, remind her she can pray for strength and peace, comfort and a good night's sleep. One of my most profound spiritual experiences was when I was about 12-13, I was home alone and there was a very roundy party going on next door in our rough neighborhood. Prayer has amazing power.
Also, be careful what she is reading / watching, especially before bed. If she watches scary / adventure movies with a lot of suspense, they may need to stop, at least for a while.
Hope you find a solution soon,
S.