Do I have enough goat?... I mean Ram......

Seems like a decent match to me given how you're planning on loading the truck. I wouldn't want to go a whole lot bigger with a half ton but I don't see any obvious issues. I would definitely put E rated LT tires on it when it's time to replace the current set, and depending on how it rides the truck might benefit from bags or timbrens. I'd see how it does first before doing either, though.

I would pay attention to your tire and axle ratings too. In a lot of half tons a full payload weight on top of the rear axle will exceed the axle and/or tire rating.