With all of the work that the Cougars are doing with the schools in the area, how about having it on an afternoon (Saturday or Sunday) with a (or several) junior rl competition(s) running at the same time?
This would also get parents (and schools) involved (hopefully). Evenings are difficult for me and, from other comments, it would appear to be difficult for others also.
Looking to the future; start a £10 monthly Standing Order scheme in January (obviously towards the end of the month) so that fans can start saving for next season's Season Ticket. There would (hopefully) be a surplus by November [depending on the price of next season's Season Tickets, which could then be offered as a raffle prize (or prizes) for the participants as an additional incentive.