The longer the trailer, the easier it will be to back up straight and also less sway while traveling. Of course it takes up more room at campsite and requires more turning radius. The extended tongue is a good idea to avoid contact with the back of your RV.
Steve & Nancy
2005 Itasca Sunrise 33', W20 Chassis, Ultrapower, Henderson Trac Bar
2012 Chevy Captiva Sport AWD, ReadyBrute Elite Tow Bar, Blue Ox Base Plate, Protect-A-Tow