Our boat is a bit smaller than yours (20') and we only are up there for one week, so we just use a good size fluke style with chain on one end and then we have one of those small mushroom style ones leftover from our small 2 person boat. My hubby jumps in a the sandbar after we get the fluke style secure and makes sure the mushroom style one is set and with those two it holds the boat very well. If we were up there more often (oh how I wish), then we'd re-think it.
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