Hi All! Pretty serious about changing from Class C motorhome to Truck-trailer combo, due to overall costs associated with driving it. The biggest trailer we're looking at is about 8,000 dry & 10,400...
You have gotten lots of good, correct answers from lots of experienced RVers.
My stock answer to this question is: Forget about MPG and you will have a better time. If you are going to be an RV'er, relax and get on down the road. You are going to get terrible mileage.