A couple of things you might want to look at on the hitch. The top latch design is adjustable. If it's too tight, it will not slide over a 2" ball, despite the fact that it's made for one. Loosening the nut until a proper fit is acquired is the fix. Also, I have seen hitches bent on the bottom side by receivers mounted to tractors on a three point system. Too much metal hanging out from the base of the ball and lifted at high angles by way of the 3pt hitch can catch and bend the locking mechanism and cause various problems depending on how it's damaged. And of course, the top of the hitch should be imprinted with the size of ball it's designed to attach to.

I looked up the model of boat to see how it was laid out. From what I seen, it appears to be a somewhat narrow deep v design with an open bilge for a portable fuel tank. If that's the case, you will have to secure the tank in a fashion suitable to your liking. The listing and stability of the boat can be tricky on boats like that. Try to place as much equipment weight along the centerline of the boat or offset it with similar weight items on opposing sides of the centerline.