We've visited Butler's Orchard for several years and always have a great time visiting. We make it a point to come during blueberry season (July) and pick at least 10 pounds of blueberries. The picking is easy, there are plenty of bushes and even with large groups of people visiting (on weekends especially), it's still very pleasant. On busy days, they run tractor rides between where cars are parked and where the blueberry fields are located. On slower days, you can drive right up to the fields.
The orchard also has a variety of other fruits to pick during their seasons - cherries, strawberries, blackberries, etc. There is also a market for buying smaller amounts of produce and items like apple butter and honey.
Check the website before visiting: