@ShyMaryEllen
I worked for a PR company that dealt with prize winners (pre Omaze) back in the day. You need to bear in mind that a lot of what you see is ‘staged’.
I am sure they contact the winners before coming to visit. Probably half the winners are away in August and they’d use a video call or something.
I notice they don’t release the winners details immediately to allow time for background checks and to contact them first no doubt.
I think publicity is part of the deal but I note that spouses appear to be able to withhold public information. If you were under witness protection or something maybe you could be anonymous.