Not a silly question as most of us have already asked it
A player involved in the bye will register a 0 score, which makes your bench players important as they must play in order to substitute players around the byes.
HOWEVER......the good news mum being that rounds where 3 teams have the bye, this wont be classed as a round for match points. You are still scored for your overall points tally (if your playing to win the 50 grand overall prize) but wont affect your league games if half your team is missing due to the 3 team bye rounds.
Basically the aim i found is to make sure you have an even spread of players from each team, and to make sure your bench players are likely to play.
Hope this helps

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HOGG Shield 2015 Division I Premiers.
HOGG Shield 2017 Premier League Premiers.