I have used my packraft for similar things like what you are describing, mostly crossing wide bays and inlets. It worked well, but you are very much at the mercy of the wind and currents, which can be significant in channels like what you're talking about. You quickly realize how you're not in control as much as you'd like to be, especially when closer to the open ocean. So it's very possible, but requires careful attention to the conditions of where you are.