We just purchased a new 2017 Forest River Salem Hemisphere 299 RE. Dry weight=7,439 lbs, hitch weight=730 lbs.We own a 2013 Ford F-150 XLT 1/2 ton with a towing capacity of 8,000 lbs and a 3:31 rear axle.Do we need to move up to up a 3/4 ton with a t...