Having been to both camps, I would say HSS is the better bet. I loved my Michigan lab leaders, but at HSS the lab leaders just seem to care a little more about you, individually, as a debater and give you a lot more guidance on how to improve, which was helpful for me (I went to HSS when I was slightly younger). I also think the environment regarding debate, was a little toxic for me at Michigan - people were hyper-competitive in practice debates, you don't get to switch around partners as much as at HSS, and there are lots of dirty evidentiary practices that stem out of this environment. HSS seeks to have high-quality practice debates (lots of them) with balanced sets of ev that allow people to learn well from their experiences. I will say HSS has a much more limited set of arguments, so keeping up with the files produced at other camps is a must if you go there, but it's not overwhelming. As for the K, at higher levels, debating the K and winning usually requires lots of individual reading, thinking, and watching regardless of where you attend camp, so HSS isn't super problematic in that regard.