Yes, the Friday immediately before every Northwoods Team Trail tournament is off-limits. Scanning is allowed, however, if you are seen fishing at all (even for another species) on the body of water the tournament is being held on the next day you will be disqualified. No refunds.
The deadline to enter any Northwoods Team Trail tournament is always the Wednesday (prior to midnight) before the event. No "cash at the dock", no late signups, no exceptions.