Full Freezer,

Sounds like our boats are very close in size. I run a 65# can style anchor on my 20' inboard. I did have to make a modification on the spikes to get it to hold though. Welded 2" X 2" X 1/4" pattles at a 45 degree angle to the spikes. Now it will stop the boat any place I drop it. As for sand on the Columbia I use the EZ Marine set up with 300' of 1/4" rope and a puller system.
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Remember always "Fish 4 Fun"
Puget Sound Anglers -Renton Chapter-
Co-Event Coordinator Salmon For Soldiers