There is actually two forms of harvest: wet and dry picking. Only the berries picked through the dry technique can be marketed as fresh berries. We use the wet method. To do this, you flood the bog with water when use what is called a beater to, what else, beat the berries. Then all the berries float to the top of the water and are corralled using boom boards which are two boards screwed together in a T. You string all the boom boards together and use these to move the floating berries where you want them to go. Our boom boards are yellow (thanks to a summers hard work by my sister and I who made all of them) as you can see in the above pictures. Once the berries are corralled you then push them up an elevator which moves them onto a truck. Of course this is just my take on the harvest. :) For a more detailed account, try Wikipedia, theirs isn't bad.
This is a great picture of the whole opperation
Here I am pushing the berries onto the elevator
And there is my dad making sure the berries go where he wants them to.