Last year's beaten finalists were 14 points better than Castletown.
Camross began their campaign for a county title in fine fashion in Portlaoise last night.
Last year's beaten finalists opened their Laois Shopping Centre Laois Senior Hurling Championship campaign against Castletown.
There was a a five point gap in favour of Camross at half time, who then made a decisive move at the start of the second period, scoring 1-5 in the first few minutes.
The final score was 3-22 to 1-14.