Any large truck(semi-tractor) with a fifth wheel(Holland) hitch can tow a 5th wheel RV in an emergency. This is just one of the advantages of having a RV emergency road service. They will send the appropriate assistance for your rig.
We had a blowout last August. Good Sam ERS sent a HDT wrecker to change to my spare. I calculate the cost of the wrecker, 2 men, and 2 hours work was about 3 times my annual premium.
UPDATE: Both Coachnet and Good Sam ERS have 3 levels of service, both companies priced the same. Pick the level best for your needs.
Class 9??? Man, you've made every truck classification
chart in North America obsolete.