This is the one web site that lists all of the known pick your own fruit and vegetable farms in almost every state in the U.S. and 5 other countries, as well!
Why pick your own?
The quality is much better than any store or farm stand, when you choose the fruit and get it right from the plant. It looks and tastes better. The produce is healthier, too, because it is fresher and you can choose organically grown farms. The costs are usually substantially less; the farmer doesn't need to pay labor to pick, and he has no packaging or shipping costs. If you plan to can or preserve any jam, fruit or vegetables, this is the best way to get the quantity, quality and price you want. And finally, it's fun!
If you like to eat a lot of fruits and vegetables check this site out. A friend turned me on to this when she gave me some blueberries that she had gotten on one of these trips and they were the best blueberries I have ever tasted. The site also has tips on picking and directions on how to preserve it or can it.