The best kind of roses to get your rose hips from are antique roses. After you enjoy your beautiful roses they will produce rose hips. You should always wait until after the first frost to pick you rose hips for the best flavor and vitamins. You can read all about it if you go to the button on the left that reads "Edible Flowers" then scroll down to find the link for "antique roses".
You can find recipes for Rose Hip Tea if you go to the button on the left that reads "Medicinal Teas" then just scroll down until you find the link that reads "Rose Hip Tea".