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According to the detailed information for Delaware on that web site, you will be illegal if you tow a golf cart behind your Jayco.
For Delaware:
TRAILER DIMENSIONS
Total length: 60 feet (65 feet for an RV towing a vehicle); trailer length 40 feet; motor home length: 45 feet; width: 8 feet 6 inches for trailers, 8 feet for motor homes (excluding safety equipment); height: 13 feet 6 inches.
TRAILER BRAKES
Every motor vehicle when operated on a highway shall be equipped with brakes adequate to control the movement, and to stop and hold such vehicle and any trailer attached thereto, including 2 separate means of applying the brakes.
Brakes are required for any vehicle and load with a gross weight over 4,000 lbs.
TRAILER HITCH/SIGNALS
Safety chain is recommended.
TRAILER LIGHTING
Every trailer shall be equipped with at least 1 tail lamp, mounted on the rear, which when lighted emits a red light plainly visible from a distance of 500 feet to the rear.
TRAILER MIRRORS
All motor vehicles shall be equipped with a mirror placed so that the driver may readily ascertain the presence of any vehicle traveling in the same direction and overtaking the Driver’s vehicle.
TRAILER SPEED LIMITS
No trailer carrying a gross weight of load in combination with a vehicle in excess of 4,000 lbs. shall be operated at a speed over 10 mph unless equipped with suitable brakes controlled by the operator of the towing vehicle.
TRAILER TOWING
No vehicle shall be driven upon any highway pulling more than 1 other vehicle.
The drawbar or other connection between any vehicle and the vehicle it is towing shall not exceed 15 feet in length.
If the connection between 2 vehicles, 1 towing the other, consists of a chain, rope, or cable, there shall be a red flag or other cloth not less than 12 inches square attached to the connection.
TRAILER OTHER PROVISIONS
It shall be unlawful to ride in a house trailer being towed by another vehicle.