If it was only the parking brake issue your can pull the cup holder out and turn the nut a few times and your good but the pedal to the floor is a bad thing especially if brakes fail launching the boat. If you’re unable to do these repairs yourself go have it done on the much sooner side and stop towing anything and preferably don’t drive the truck much, if at all. Good luck, post up what the outcome is.
Clint
Clint