Unfortunately, there usually isn't any coverage provided for contents
when you tow something - only for the entity with which you are towing. Meaning, while the trailer would have physical protection extended to it, the contents you were towing would need to be covered by something else. If you have a renters
policy, you might be able to find some coverage there. For your motorcycle, you would actually need to file a claim with your motorcycle insurance
coverage. It is specifically designed for situations like this.