2018 Heartland Sundance XLT SD 289 TS, 2018 Heartland XLT Sundance SD 289 TS Lighter Weight. Full Featured. Whether you are looking for a 1/2 ton towable or are just tired of hauling around and maintaining a larger luxury unit, SUNDANCE S5 answers the call by providing you the luxury amenities of our top selling SUNDANCE S5 in a smaller, lighter, easily manageable, laminated, fifth wheel. From ...