1. There are UTV bed racks that allow you to run the UTV tires over the top of the cab. This will give you a tall height with more weight located higher than you are used to. When sizing trucks, look at the weight of the UTV, rack, gear, people and hitch weight so you do not go over axle or wheel weights.
2. Torklift makes a SuperHitch receiver designed to tow heavy trailers on a double truss extension. This allows you to carry the narrow UTV in the bed, yet extend the trailer far enough back so the 9-10' UTV does not interfere with the trailer. You still need to take in account the items listed above when sizing the truck, but now you have to add the additional weight of the SuperHitch and SuperTruss instead of the UTV bed rack. With the UTV lower in the truck, it will handle better with a lower CG.