Type of shirt is one of the primary keys to success or failure using your method. You may need to carefully select a few that you know work well.
Goodcooker's mention of stealthily placing a rig elsewhere than on yourself is a very good one when applicable, especially when there are tables.
When that isn't applicable, a hat like he mentions or a glasses rig like nassau73 mentions are the general go to approaches for most tapers. Primary benefit of them is it gets the mics up as high as possible, making getting a clear line of sight from PA to mics more likely, which can make it more suitable for tightly packed standing concerts in addition to seated ones where there is more space around you and the mics need not be as high to achieve a good direct line of sight. Secondarily it allows for the use of a microphone configuration that is closer to standard open microphone configurations: a near-spaced arrangement using directional mics, or HRTF style using the head as a baffle. Primary drawbacks are not being able to turn your head much, having to wear the hat or glasses, and dealing with some partly exposed wiring unless you sport hair longer than collar length.
Personally, I strongly dislike having to hold my head still and not look all around, tend to record in situations were a hat is not acceptable and don't like wearing a hat indoors anyway, am frequently in situations where I cannot have any exposed wires, and am mostly recording at seated venues where there is more space between audience members even if everyone ends up standing up rather than sitting, so I prefer using alternate methods which work much better for me given all of these constraints.
There are generally common approaches to worn microphone rigs but no single best answer for how to do it that is going to apply to all stealth tapers and situations. Keep playing around with ideas and you will figure out what works best for you in the situations in which you record, informed by the advice you receive here and your own creative scheming.