I think you'd be fighting a losing battle with that given how embedded Union is in the area. Ilkey, Skipton and the other Dales towns are much more affluent areas (not hard compared to Keighley) where Union is the sport of choice at amateur level and indeed in schools. Probably more so than football in a number of those places. People gravitate to the bigger teams playing at a higher level. In fact there are probably more Wigan and Saints fans in that area than there are Keighley fans so it's hard to spread the word.