Still think you should try what gutbucket and I both suggested. Place the H4n (or Q8) at the stage lip and then take a line out from the mixer (a copy of the mix being sent to the main PA speakers) and add that, they are both 4 channel recorders. The internal mics on the Zoom will capture content from the stage, the line in will capture what is low or missing from the stage. Then afterwards you adjust the balance between them to your liking. This will significantly improve the quality of your recordings without any additional gear and without worrying about unattended gear in the audience.
This sounds like a great idea. I had initially dismissed it mentally because it sounded a helluva lot more complicated than it actually is when you guys suggested it, and I was trying to simplify as much as possible. I just have to look at the Q8 and see what the Line in is, whether it is 1/4 inch, XLR, or 1/8" stereo. Since everything is going through the mixer, especially when I am playing live with my backing tracks, and my guitar goes right into the mixer via my Fractal FM9. For some reason, I misinterpreted what you guys were saying as using the mixer to record, which would send the audio to my iPad via Wifi, since it's a Mackie DL-1608. But you guys are actually talking about using the Q8 or H4N to take a line from the mixer. lol Not sure why I missed that.
I am playing again in a couple of weeks, and will try that.
I don't have the Zoom in front of me at the moment, until I get home, but there are four input or record LED lights on the unit, and usually only the two top lights are lit, which I assume is the stereo signal from the onboard mics. I never really gave it much thought what those other two red LEDs are for, but since reading your post, I am going to assume that they indicate the line in, which in this case, would be from the mixer.
Thanks again! This is what I am going to do. I suppose if I am still not 100% happy with the quality of the recording, a good next step would be buying a pair of decent mics for the Zoom. But I am getting ahead of myself.