Any feedback from any of you guys/gals on use of these types of anchors? I like the portability of the sandbag anchor, but it really doesn't look like it'll really do much as far as securing the ski (especially if it's a little windy). The fluke anchor looks a little more substantial, but I worry about it moving around in the hull when the ski is underway. Any pointers or suggestions as to which anchor to use or how to secure the fluke anchor in the ski?