At Bell Acqua Lake 2, we spent much time determining what we should / could do. We had various opinions and ideas and wanted to line the turn areas and east side of the lake with rip rap and sand the west side of the lake. We ultimately decided to rip rap the entire lake and build 3 walkout areas on the west side.
We purchased fabric, lined the shoreline and then place the rip rap on top of the fabric. With then did the same to the turn islands. One of our members came up with a great idea on how to transport and drop the rock perfectly in place on the islands and it worked easily.
We did this 7 years ago and the lake skis fantastic and has not degraded during that time. The downside is that for tournaments you need to swim to one of the walkout areas to comfortably exit the water. We also then spent considerable time improving the common area with grass, irrigation landscaping and structured water quality treatments.
The rock we used was not round river Rock because our experience was that it did not stay in place and required regular maintenance. I can send pictures and specifics on the size rip rap we used, the amount and the rough cost if interested.
Our results have been great.