This maybe be a terrible idea, or it could work great.
What about setting up laptops with Octgn, then have then use it.
Most could install Octgn and build a deck, then bring a flash drive if they don't have a laptop.If they can't, you can set a laptop aside just to build a deck, then use a flashdrive to transfer the deck to a open laptop.
Pro:
-Speed: Playing on Octgn seems to save between 25-33% time.
-Table space: A laptop takes a lot less table space.
-Moving Tables: Instead of having to move to a new table for each game, you can just login and play against your opponent. You could make general accounts that you can just upload your deck from a flash drive, if you did not bring your own laptop or you don't have a Octgn account.
-Larger number of players: you can enlarge the tournament, if you can find a way so each player only plays between 4-5 games.
-Possibility of opening up tournament to people in Europe.
Con:
-Can't see your opponent: Seeing you opponent usually gives a lot of clues to what he/she is thinking.
-Laptops: Bring that maybe old laptops + setup is going to be a pain.
-Electronics: There will ALWAYS be a problem!
-Stupid People: 10% of people are idiots!