Obstructions on the field

Hello LMRians,

A week from now, a huge covered hall will be overtaken by an army of robots - over 60. My robots will basically be a bluetooth controlled robot and a transmitter (2.4GHz) controlled robot.

There will be other robots running on Bluetooth, Wifi, RF Modules, etc. I am curious about the major obstructions (frequency variations, data collisions, etc.) among/between robots,

It would be awesome to hear your view/experiences on this issue. How did you handle it? What particular things do I need to put in my mind? Thank you very much.