If you added a truck + trailer when you got rid of the motorhome, the numbers are going wash. The truck still requires liability coverage and its own collision & comp, so no gain there. And the trailer still needs collision and comp too. No free lunch if you end up with the same number of motor vehicles and about the same [combined] value of them.
There are several agencies (brokers) that will get quotes for you form several possible insurers. Gilbert RV Insurance is one, Miller RV is another.
Former owner of 2004 American Tradition and several other RVs
Home is in the Ocala Nat'l Forest near Ocala, FL