Load your trailer to attain a 10%-15% tongue weight. Distribute 60 percent of the load over the front half of the trailer. Also, make sure that the weight is distributed evenly from side to side. Uneven distribution can create unstable conditions, such as trailer sway and uneven tire wear. Firmly secure the load to prevent shifting during cornering and braking which could result in loss of control.
Be sure to prepare your RV for travel. Take a few minutes to secure all items inside that may fall or break and shut all drawers and cabinet doors completely. Take a final walk around outside to insure jacks and steps are up, all exterior doors are closed and locked, antennas and vents are down, and all cords and hoses secured. Make one final check of your hitch, safety chains, exterior lights, tires etc.
When backing up be aware of the height of obstacles behind you. Overhangs, tree limbs, stumps, etc. can cause extensive damage and may not be visible in your mirrors. Distance is also hard to judge when backing a long RV. If you are not sure get out, walk back and look. Whenever possible have someone guide you.
If you are unfamiliar with backing or towing, your dealer will school you when you take delivery of your RV. A large empty parking lot is a good place to practice maneuvering and backing.