It is a far better thing to paddle past an occupied campsite in the morning, with its occupants still abed, than to paddle past an occupied site late in the day, in a frantic search to find an open site before sunset. Be sure to bring along your treatment of choice. Drink plenty of water. Dehydration, especially in summer, is an ever present risk. Pay especial attention to any children in your party.
Sunburn is also a risk and one which is magnified on the water.
Wear a hat. Bring sunscreen and use it, especially if wearing shorts. Make sure any kids do, too. Portaging Expect to get your feet wet. Rocks at or near the surface of the water can rock and roll.