I had to take the rudder off my Catalina 309. By the way Catalina, thanks for not getting the rudder tube straight when you built the boat and cobbling up the bearings so that the whole system would fail and then refusing to fix it....okay, got that off my chest.
But anyway, I dug a hole. Dirt lot and extremely hard-packed. When I went to the marina office and asked if it was okay to dig a hole, they handed me a pick. Never used one of those before, but I see now why those old prospectors always had one strapped to the side of their donkeys.