JJ yup JJ receivers (let us please call them beneficiaries, receivers are completely different) can be executors and at least one should be....
Beneficiaries dont have to be told until your death
Choose your executors well - I am not keen on lawyers as executors as they can charge and charge and charge....
and then go to a lawyer who specialises in wills ( who will say; yes I know, I should be executor ) and pay. Paying for a will is not that expensive (hundreds)
By contrast I have divided my stuff unequally between beneficiaries ( all over 21 ) and said to them basically I dont give a toss if you disagree, this is my money and this is how it is going to go.