I would moor it on the Selby canal, a lovely littles stretch and drop down thro Knottla onto the Aire and Calder. The A and C itself is fairly boring but big so no need to worry about winding holes to turn and go home and big easy locks that are electric. Do a right turn and go onto the river at Ferrybridge through to Castleford as thats a lovely stretch. Or go down the New Junction onto the Stainforth and Keadby, several marinas and moorings along there. Bramwith has some nice moorings just as a for instance. You will need eyes in the back of your head with kids that age but you know that already ? Even a mooring on the A and C at say Pollington when they come up, all very short journeys by car from where you are.