It depends on your definition of hiking but you will at most walk a mile or so at most landings. It can be less. The things to see tend to cluster at and within a short walk of the water. And the boots, while comfortable, aren’t really made for long walks. You land on the Antarctic peninsular for the sensory experience (sight, sound, smell), not for aerobics. Standing next to a penguin and watching it is a lot more fun than walking by it. If what you want is to truly stretch your legs I believe there are boutique lines that will better serve you than Seabourn will.