Heat a large saucepan of water over an outdoor cooker or medium-high heat indoors. Add bay seasoning to taste then bring to a boil. Add potatoes and sausage then cook for about 10 minutes. Add the corn and crab; cook for another 5 minutes. Add the prawns when everything else is almost done then cook for another 3 or 4 minutes.
Drain off the water then pour the contents out onto a picnic table covered with newspaper. Grab a paper plate and a beer then enjoy!