My hubby is from Boston! (Watertown). He went to college at UMassBoston.
Just a suggestion, but one that might put your mind at rest: Why not have a registry office quickie wedding in the UK, and a blessing (or party if not religious) in New York at a later date. You can get a fiancée visa in January, which will be valid for 6 months, thereby ensuring your February trip will be fine, and with it being a multiple entry visa, you can go back to the US and come back to the UK again no probs. Hubby's family may like the idea of the registry office ceremony if they are unable to travel to New York, and your own family will of course have the blessing/reception in NYC to attend! I know this way you'd have to pay the £250 twice, but as you said, you both have good jobs so it shouldn't be too much of a burden.
Just an idea anyway.