I stand to inherit a large estate over the next ten years or so. The inheritance will come from my direct parents and step parents, who have no other children. 

However, I know that other members of my family will pressure me to share money and property that they have no legal right to. I have my own career and live comfortably enough that I don't need the money. But I don't want people to take what my parents didn't want them to have.

How can I tie up an investment portfolio, bank account, and property (if possible) such that even I don't have access to it for a few years?