Bit of advice - All i will say is that many horse yards are not child friendly and many people paying for horses to be stabled there will object to the little ones - especially if this is their escape from there own.
Now you are new on the yard and i am sure you supervise and keep your children quite and dont let them poke sticks in horses eyes and hide in bushes to jump out and scare horses for fun - and put soil in the water troughs and i am sure you cover the menage surface back up and i am sure that you do not leave the children locked in a car whilst you go off riding. But i would still tread a little careful - i have know children be the cause of at least 3 huge rows on 2 yards - and youve had enough problems recently.