Hello Allan
Last year my wife and I were vacationing in Cape Breton. We actually drove from Sydney down to Antigonish for the games, and then back "home" again. It made for an extremely long day....but we felt it was well worth it.
We went for the day on Saturday, got to enjoy the pipe band and dance competitions, some of the heavy games and some excellent music entertainment.
There are activities all week long leading up to the "main event" on Saturday that may be worth seeing.

We are planning another trip to Cape Breton this year, and are looking forward to attending the games on July 7, 8 and 9. We are currently looking at options for staying over in Antigonish for that weekend. We definitely would like to be there this coming summer!