Larger fifth-wheel travel trailers are the more practical choice for RVers seeking maximum living space. Some believe that they are the best choice for full-time living. Full sized fifth wheels can include up to three large slideouts and more standing room in the front bedroom. Also, larger fifth wheel models are available with a wider range of appliances, including built-in washer/ dryer, dishwasher and entertainment center with surround sound. The larger Fifth Wheel units do require the larger dual-rear-wheel pickup trucks for towing or some fifth wheel owners choose specialized medium duty trucks that have been converted specifically for the purpose of towing a fifth wheel while providing optimal travelling comfort in the cab. It is very important to match the size and weight of a new fifth-wheel to the tow vehicle. It may be best to select the fifth-wheel of your dreams first and then order a truck of adequate towing capacity.