Playing a match in a big venue like MSG that holds numerous other events would make doing this easier. There are concerts there for example that involve bands setting up a lot of equipment. Get some of your chess team members to take temporary jobs on the crews setting up some of those shows and you might have a good chance of sneaking your chess cheating equipment in.
I think what you want to do with this kind of match is play each game in a different venue, and the players do not find out where the venue is until it is time for them to be taken there (on transportation arranged by the organizers) for the game. The player's teams are not told where the venue was until after the game.
If a player is going to cheat then it has to be done via something entirely contained on/in the player.
Maybe even have some of the games played on the move. E.g., the players are driven to an airport, board a chartered jet, and play their game in flight while the jet just flies around over a wide area.