A 5 is a borderline suit for Dutch Springs. My wife and I used them for our classes and even in August and October it got cold. My recommendation would be to buy a cold water suit. A 7mm Farmer John or a semi-dry. Spend the money there. For a warm water wet suit, start hitting up surf shops on the NJ coast or in Florida. My godfather got his daughter either a 2 or 3mm shorty for $50 in the Keys. It's not name brand but who cares, it'll get the job done.
I bought both myself and my wife warm water suits from Breakers in Bethany Beach, DE after Labor Day. They were 50% off on name brand suits. Mine is O'Neil and hers is Billabong. I just got an 8/6 semi dry to use almost exclusively at Dutch and I am happy with it, but the farmer john style maybe warmer. Considering one for my wife to use at Dutch.
I bought both myself and my wife warm water suits from Breakers in Bethany Beach, DE after Labor Day. They were 50% off on name brand suits. Mine is O'Neil and hers is Billabong. I just got an 8/6 semi dry to use almost exclusively at Dutch and I am happy with it, but the farmer john style maybe warmer. Considering one for my wife to use at Dutch.