If you have a homeowners or renters insurance policy, you're most likely already covered for loss of personal items stolen from your car. (allianztravelinsurance.com)
If you are able to prove that there was forced entry into your hotel room, you can submit claims for loss of personal items up to the amount that specified by your policy. (travelinsurancereview.net)
For example, your car insurance comprehensive policy probably has no provisions for loss of personal items if your car is broken into. (rentersinsurance.net)