[JRTJH]

It looks like a marine transport company truck (without the trailer with the other three or four boats)... There's no prop (if it's an inboard) or no transom unit (if it's an I/O). The Four Winns boat factory is down the road from us and we regularly see rigs similar to this with one, two or three boats on the truck and more on a trailer being towed behind the truck. Often the "truck loaded boats" are angled toward the cab, but riding on a "headache rack" above the gooseneck coupler is also a common means to carry "one more boat".....

Certainly, it's not a "sport fisherman on his way to the lake".....