Cross open choppy water in the wind, solo, pull up on a sandbar, dig for clams and have a cold.....(you pick that one). When you've filled a bucket or two with clams, you run outta beer, or the sun starts gettin low, you shove off the sandbar, cross the open choppy water, now with a breeze freshing up, and head for the hill.
Cargo is 1-2 people, extra paddles, pfd's, an anchor, medium cooler, and maybe a trolling motor and car battery. Some how, this all adds up to enough weight to sink the Queen Anne's Revenge, no matter how many of the beers you drink. The wind is the greatest enemy, more than the waves or the shallows. The wind saps you. 15-20 mph on a typical summer afternoon, and on the trip home when you're already tard(er, I mean tired).
Wind means low sides, unless you sail or pole. Sailing and poling dictate more width and or higher sides than a "normal" canoe, if such a critter exists. But like Old Sparkey said....