99% of my boating is done on Cumberland and I use a box anchor as well. I have 125 feet of line and another 75 feet of backup in case I get into a really deep spot. I have never had it break loose on me and it always comes back up no problem. One year I had 6 boats 25-30ft tied to it in Harmon and we were the only ones not moving!! I also like how it folds flat for storage in its bag. its all I will ever have!!

Find a big cruiser with a windlass make friends and tie up next to them.