I think that each of the plaques should have a place, and an accessible place, but truth be told, for many years now the ashes have been spread in the remeberance garden of the church. The pitch the last ashes were spread on has long since been replaced.
While its a lovely idea, I personally think that the ashes of those who felt so connected to Goodison to have it as their final resting place, I feel their soul should remain, but their memories continue to be celebrated. May be best to ask the families of those at rest though, its a really sensitive subject.