Hertz Trailer Rental Insurance costs about $20 per day. This is on top of other Hertz costs such as its daily trailer hitch rental of about $150 per day and, if you need a dolly, add another $5 for that. Does this mean that you should avoid this coverage? No it doesn’t. It does mean that you should plan your trip carefully and try to allow for the minimum number of days on the road with the maximum number of miles between stops. Let’s say you are planning a 450-mile tow. If your vehicle is a pickup, for example, you can probably expect to make that in an easy day’s run so all it will cost you is a total of $175.
For more info, see Average Cost to Rent a Car With a Trailer