This is a good idea, will definitely try to get down there.
Opens up the question as to whether tier 2 and 3 sides could consider partnering with a super league side, a bit like duel registration, with this sort of deal, season pass holders from a certain SL club could go to a lower league team cheaper and thus increase attendances and exposure of the lower leagues.
I read that Newcastle Thunder are doing a similar thing with the union side so union fans can go to league at a discount, good idea, especially if new fans are created!