2011 TRAILSTAR Z9 Suspension Problems

ON JULY 7, 2014, WE LEFT TO GO CAMPING TOWING OUR BOAT BENIND THE RV. WE WERE TRAVELING DOWN I-40 AND ABOUT 100 MILES FROM HOME WHEN WE NOTICED THE BOAT TRAILER WAS SWAYING. WE EXITED THE HIGHWAY AND DID A WALK AROUND THE TRAILER TO CHECK THE TIRES AND HITCH BUT DID NOT FIND ANYTHING WRONG AND CONTINUED TO CONCHAS LAKE STATE PARK, AN ADDITIONAL 90 MILES OR SO. WHEN I WENT TO UNHOOK THE BOAT I COULD NOT. TRACKER TRAILSTAR FEATURES A SWING AWAY TRAILER TONGUE THAT WAS LESS THAN 8" OFF THE GROUND. THE BOLT (ON THE PASSENGER SIDE) WHICH HAS A GREASE HOLE DOWN THE MIDDLE BROKE WITH ONLY A THIRD OF THE BOLT LEFT. THE WELD THAT HOLDS THE LOCKING PIN ON THE OTHER SIDE OF THE TONGUE WAS ALMOST GONE AND I WAS AN INCH OF WELD AWAY FROM LOSING THE BOAT TRAILER. I...