I visited there on a smaller expedition tourist ship (~100 passengers) last January-February, which is their summer. It was still cold! As a boater, I had many thoughts about what it would be like, or take, to
cruise down there. I did see a few private sailboats during the cruise, most anchored up in inlets where a few outposts and stations were located. From my perspective, the trick is to get across from southern
Argentina, say Ushuaia, to the Peninsula. That stretch of
water is notorious for rough seas, even in the best
weather. Keep in mind your course has you cutting directly across the prevailing Antarctic
Current. Once across, the stories of icebergs are very true. Even in the short summer season, bergs are everywhere, and clog up some passageways, even blocking them. Keep in mind there are no
fuel stations, no stores for provisions. I didn’t check but I believe you can’t recreationally
fish anywhere within Antarctica. So it’s pretty serious business if you go down there.