First off, if you purchased general admission, it's usually standing room only. Seating is available in the balcony. Always be about 30-45 min early to make time for parking and the line flr admission.
I agree with Suzanne about the arrival time. However, depending on the show, they sometimes have General Admission seating. For example, Live on Mars! Provided seating for General Admission and in the balcony.
If you bought a seat, aren't they numbered and assigned? You shouldn't have a problem getting your seat that you are assigned to. If its GA Pit, those are standing room only. Arrive a little earlier so you can grab a beverage and/or merch. Have fun!!
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