What to do in a Picnic/BBQ situation?

With all the delicious craft beer we now have the option to drink, it proves difficult which beer to drink while going for a long session. Although I will always choose quality over quantity, sometimes quantity is the name of the game. The question is which beer do you choose for long days out on the river, or a long day of drinking at a BBQ or picnic. The usual suspects, Bud Light, Coors Light, Miller, Corona, are what we usually encounter. Light, Low abv%, cheap beer. Which is fine but I am currently looking for good session beer that can be consumed in large quantities without breaking the liver or the bank. Anyone got any suggestions?