Cant see survey on tapatalk so here goes,
Large sites near to river, friendly staff that get involved eg, Xmas , Easter and New Years, clean amenities don't have to be flash just clean, bin/ recycle/ cans ( extra coin),hire canoes/ tubes for the river, shaded area for kids, eg, sandpit.
Pets by appointment,seperate entry to river for kids/ people and dogs.
I know Knorrit flat was for sale a little while ago, inland from nabiac.