Depends on your size boat. I never had to use 4wd with my 23', which weighed around 6000 with boat & trialer. I also had to go deep with it sometimes, getting about a 1/3 of the rear tire in the water. However, I have a heavy duty 3/4 ton, which is a heavier truck than a 1/2 ton, and will perform better in 2wd. Without knowing your size boat, I cannot say for sure. But as long as you are not towing over capacity, you should not have a problem. Getting the tires wet is not usually a problem, it is the when the seaweed is at the docks. Just use common sense, such as using low gear if necessary, do not floor the gas and spin the tires, as this makes it worse, and try to avoid seaweed. If one dock does not look bad, and one is covered, you know which one to use. Also, two footed driving is useful. Sometimes it can be like trying to get a 2wd unstuck from the snow. Again, the weight of your boat will be critical. In addition, the type of trailer & boat style will make a difference. Some require you to go deeper than others. Rollers are easier than bunks, & you do not have to go as deep with rollers. The tires on the truck will also make a difference. Is this a new boat as well, or have you launched it and know what is necessary? Some things to consider. Good luck to you