Just caught up on this thread, I was involved with Sunderland City and we were the oldest and longest running team in the North-East. Unfortunately we had to disband through lack of commitment from some players and having to rely on Union players to make up the numbers, plus due to the age of the people running the team it eventually ended up with one chap doing all of the organising.
When the team was first formed and for many years after we played in the York Sunday league and although we struggled at times with player numbers we for-filled all fixtures and the players we had only played League. Unfortunately when that League disappeared we struggled for fixtures until a North-East league was formed. and games moved to the summer, then some of our players went to play Union during the Winter and because the seasons overlapped we ended with few players for the start of our season.
The Rockets are doing a wonderful job, and by developing the sport at junior level (which in my opinion is the right way forward) hopefully Rugby League will become their first choice sport and maybe then proceed to play Open age rugby.