I forgot to mention. You would be well advised to practice dry firing in the prone and sitting/kneeling positions about 5-10 minutes a day for about 2 weeks just prior to the event. My daughter and i did a little and we paid for it....talk about sore.....
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We also started "practicing" loading rounds in some mags for about 2 weeks before the shoot. Kept a couple of mags and rounds handy and daughter and I would unload and reload them each day to get fingers toughened up. She was glad we did. 500 rounds is a bunch of loading. Take lots of sun screen, water, bug juice, hat,...... We took some of those pop-up canopies for a little shade and it helped some.
Targets are at 25yds to and sized to simulate 100yd shot for sighting and technique training. The AQT targets are sized to simulate 100yd - 400 or 500yd shots if i remember correctly. You will shoot it from standing, standing to kneeling/sitting (transition), sitting and I think we went from standing to prone (transition). There are also required mag changes during the course of fire....2 shots in one mag...change and shoot 3 more, etc.
Have Fun!