I have one motto for taping, either do it properly or not at all.
That's precisely why I don't mess around with "stealth" recording.
I've recorded a few shows in "stealth", so I can understand and respect the desire to do it. I mean; it's a little "f--k you to The Man" and a nice adrenaline rush. But the majority of the "stealth" recordings I've heard (on LMA, as well as my own) are passable at best. And I've heard stuff there that, frankly, isn't fit to waste space on a hard disk. There are some with microphone adjustments in mid-recording (that skew the previously excellent image) or they 'bump' the microphone (or cable) several times during the set. Those are recordings with five-star ratings that rave about their "high quality".
If you're going to "stealth" record an event, you're not going to the show to "have fun" in the "traditional" whoop and holler and drink gallons of beer sense. Making and escaping with a good recording is the "fun". You're there to surreptitiously record audio (which will then, presumably, be quasi-legally distributed). There is the risk of discovery, being apprehended, and being forced to "destroy" the recording (or surrender equipment). It's not a task for the faint of heart or the undisciplined.
As it turns out; it's not for the recovering-from-back-injury, either. I have enough problems lately just sitting through a show, let alone sitting perfectly still. So I tape openly; with the permission of either the band, the venue, or both. I get better-sounding recordings and I don't have to worry about anything except keeping the drunks off my stand. Anyway; best of luck to you.