Lightbrite…………
This is lifelong business and management consultant advise, not legal advice:
You are correct, it should be kept secret to avoid the vultures and scammers who will flock to you.
You should first speak to a professional.
That may be your estate (wills and trust), business or tax attorney, if you have one. NOT the lawyer in a general practice who closed your real estate or handled your car accident.
It might be your Tax Professional (CPA, CMA or other accountant who does your taxes). That Tax professional will be able to recommend a qualified lawyer to handle setting up a trust.
DO NOT Talk to a Certified Financial Planner or other commission salesperson (Insurance or Stock Brokers for example).
If you put the asset into a Trust there generally is no need for an LLC.
Some tax authorities (varies by state and/or country) and some Lottery Operators (Same variance) allow the Trust to collect the winning directly.
In 1992 I had one client win a $10 million state lottery. The state permitted Trusts to collect winnings (as opposed to a human individual).