The ways in which average people perceive wealth are so basic, those are the first things to delete to remain stealth and lose nothing in quality of life.
Fancy cars, flashy jewelry, name branded clothes all are very easy to avoid.
Next would be where you choose to live, a reasonable home in a middle or even upper middle class neighborhood doesn't immediately stand out as wealthy.
After that, as long as you aren't running around proclaiming your wealth, it's unlikely you'd get pointed out as wealthy. There's so many people that aren't rich trying to look rich that it's easy to go unnoticed.
As for us, we live in a very average home, drive fairly average cars, wear clothes from the thrift store, and don't talk about wealth with people we're not VERY close with. In social situations when money and wealth comes up with strangers or acquaintances outside of our very close friends, we usually play pretty low key.
We're not all THAT rich, but by many people's standards we're in the rich category, say in the top 2-5% of overall net worth.