The training speeds you're doing put you near the front runners. My strategy would be to run the second day of ride.
Go to awards ceremony the night before. I've found that many people ride both days, so pick out say #5-#10 from first day and approach them. See who's doing a second day. Plug in behind them.
The first ten miles are usually hang on and pray. After that you have to follow your same training strategy and pace.
Good luck! If you attend the Big South Fork ride in September - you are welcome to ride with my group.
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