YES!  "Our lake was really full of mud and our soil type is extremely full of clay" We see this often down in the SCR as from Houston through LA and into MS, our soil type is a silty-sandy clay material. The more clay that is in the water, the more it seems as though the water is "soft", "ski shuts down in turn" and like descriptives. Last weekend at Cedar Creek Ski park in Arkansas, you could hold a cupped handle full of water and see the silt floating around in it. Most of the skiers I heard (and felt as well) said the ski shut down in the turn big time. Maybe the silt increases the drag coefficient quite a bit and at slower speeds with the ski on edge, it's felt by some. Olde Oaks (Skidawgs Lake) is similar to this with quite a bit as you can really see the silt in there.  Also, some lakes dug similarly with the same runoff areas and vegetation are skiing quite similar. My new home lake skis nearly identical as Ski Ranch, LA. Both have small run off areas and both are rainfaill-pump fed.  There were some articles about Trophy lakes a few years back about why it felt the way it did. Same principles.  I wouldn't move the buoys at all, just ski the heck out of them and enjoy. Especially with the bikinis that look to be flocking to the lake. If i had the time and energy, i would love to do water analysis from lake to lake. It's tough between skiing and working.