if you're not sure about the operation of your new deck, practice at home, recording off your stereo speakers.
I cant stress this enough!!! I do this at home with every new battery/cable/piece of gear that I get, just to test it out and get a feel for the new gear! That way, you're not doing it for the very first time the night of the show
That would solve 90% of us tapers issues and user errors, if we just tested it out at home first, before the show(s)
Then, once you get to the show, you can set your rig up quickly and efficiently, since you've done it a few times already
And its the ONLY way to know exactly how far you can push your batteries and to find out exactly how long they'll record for you
I just ran my newest PNY AD10400 battery to see how long it'll run my 70d with all 4 channels@24/96! I ran it 3 times and got around 15 hours each time! Now I know that I can reliably run that battery about 12 hours or so when at festies