You have it backwards. You want to anchor the back towards the beach, because it is very rare that a boat swamping wave eminates from the beach. The best all around anchor is called a "Danforth". It has two flukes on the bottom, and they rotate back and forth. Get an anchor one size up from your boat recommendation. I.E., If it is rated up to 18', get the one rated from 18'-24'. The real trick with a Danforth is using a chain for the last two feet of the line, the part that attaches to the anchor. This shot of chain holds the anchor down, and prevents it from levering itself out of the bottom on it's own. The thing about a Danforth is that it is not the weight of it that holds your boat, it is the design. It digs into sandy, muddy bottoms. These are available anywhere.