Depends
You should have enough power to pull your boat out of the water. If you have a larger V-6, you will have enough power to tow your boat on the road. I have a 4.3L V-6, and in normal conditions pulling my boat out and towing is not a problem, but with a head-wind or in the hills, more power would be a plus. The big problem pulling your boat out of the water is wheel slip. My truck is two wheel drive. On dry ramps, it is not a problem, but on wet ramps, my wheels tend to spin. Normally, I can load my truck with ice chest and other heavy stuff off my boat, and it helps the wheel spin problem. Another thing to remember, is when you start pulling the boat out, keep your truck pulling. A little momentum goes a long way. One of these years, I want to change my differential to a limited-slip. I believe that would solve the problem. A Four-wheel Drive shop can install a limited-slip differential. A carrier for my truck cost $450 to $500 over the internet. An Auburn (popular with street rodders) is a little cheaper...$350. It just takes money...!PS: I like my truck, because it still gets between 12 and 14 MPG pulling my boat. The big powerhouse trucks do not get much better mileage, even when they are not towing.