Compromise will have to be made to make this work ....
ST Nationals in Australia each year is a four day event .... Thursday to Sunday.
The events on Thursday and Friday are in the evening to attempt to accomodate those that work but also recognise that players have travelled interstate to attend and have no work commitments. The less popular events are held at the beginning (and in this case I think that is where LOTR would go given this appears to be an event for Star Wars).
Those that work might be able to attend by taking half a day off, or simply arriving after work. Just my 2 cents.