>>2793511cont
Parks get increasingly less travelled the further you go south towards Cochrane, mainly because they're pretty hard to reach; that whole chunk you can see in the previous map between Puerto Montt and Coihaique is very sparsely populated and extremely rough, primal land; most of the travel in the area is done by boat. If you're in a kayaking mood, that is perphaps the best place in the world to do it. I've gone kayaking there thrice; the sense of absolute isolation you get is hard to describe, since you'll be moving between literal thousands of islands that have never been set foot on, let alone inhabited. It's a very surreal place, but you need to be well-prepared. While the Navy has rescue teams always at the ready, many of the fjords have zero signal, so you can get lost and nobody will ever find out.
Parks like Kawesqar and Agostini are truly off the beaten path, but there's a good reason for that: they're incredibly remote (pic related is in Agostini). Fantastic places if you want to feel like you've walked into a fairy tale land away from humanity, but they're the sort of treks that you need to be well prepared for, as nobody lives within a good distance of them and it's all endless expanses of empty islands, primeval forests, and fjords. It's also the sort of places that you can't really visit in the winter unless you have a deathwish.
If I had to pick a single park, I'd go to Queulat: gorgeous, relatively easy to reach, not as visited as Torres del Paine, great infrastructure, and one that truly nails that fairy tale vibe you get from southern Patagonian forests.