This is a great place to go Blueberry picking.  Blueberries are very good. 

For really hot days try to go in the morning when it isn't so hot or later in the day. 

I find flash freezing them is a great way of freezing them.  

Place them on a tray and put in the freezer unitl they are frozen than put them in 1 cup baggies.  Easier to cook with and thraw out when you are doing a recipes.