Access to the park is free but it's unconfirmed at the moment about provision for people arriving by bicycle.
@knowsleysafari What is the provision for spectators arriving to the Tour of Britain by bicycle?
— LoveloBicycles (@LoveloBicycles) September 6, 2012
Update 1800: @TourofBritain responds...
@lovelobicycles You can take bikes into the Park with you, no problems.— The Tour of Britain (@TourofBritain) September 6, 2012