Sit in, don't do any work, then wait until about 2-3 miles to go then attack all out and don't look back for about 30 seconds. If no one goes with you, then just go all out solo to the finish, it should only take you about 5-7 minutes. If like you say, no one wants to work you should be able to stay away.
This strategy has worked for me about 6 times, but now the other racers are not letting me get away solo anymore.
Good luck!
p.s. - Practice this in training. Work on sprinting for 30 sec followed by high speed intervals of 5-7 minutes.