As others have said... but I guess I'd add some opinions...
1. True, if you're DFC you can actually enjoy the concert -- also the orientation of your body will seem less weird, since for stack taping, well...
2. That said, especially in a less-than-ideal situation (stealth, outdoors, amphitheater-looking thing), I find that sometimes the old stack tape sounds best. For one thing, you have the most direct sound, which will drown out the most of people talking. Part of this depends on your general taste in recordings. Some folks like the 'stereo image' and to 'hear it the way it sounded' more than others do... others like more direct sound. It's a bit like the difference in people who really love hypers and people who don't, in some ways.
Personally, if were running open and I could get a good 10+ ft up, then I absolutely would say DFC, etc. But that's not the situation you are in. IMHO most venues like that sound so poor to begin with, I'd probably rather listen to a stack tape. But that will make it tougher to um, see the concert, and make you a bit more obvious. And you may not prefer the stack sound.