Ok guys, a few more questions. I went out to my site tonight to "survey" the bottom conditions a little bit better. I took about 30' of 1" pipe with me to see how far I would be able to drive it into the bottom. On the 8' deep end I was able to drive the pipe nearly 20' into the mud, yes that's correct, 20 feet! The mud was somewhat thick, definitely not silt. On the 14' end I was able to drive it about 1' into the bottom of the lake. Here are my thoughts. On the "muddy" end I am thinking that a rugged, homemade box anchor, something like the photo. On the 14' deep end I think it would be best to use a screw anchor as mentioned in some of the replies. I think that the bottom is "solid" enough on that end to hold a screw anchor. Thoughts, suggestions, personal experience........