Ask them what do they have to offer, why should WE move our event over to FV? Tell them all the good things that NV has to offer and how can they better it. Play hard ball, and even say so, "It's time to play hard ball". It's going to take a hell of a lot to make us want to go back to FV. Make them beg, etc.
disclaimer: I'm not advocating moving, but I do advocate them begging.