If you go on opening day better get there early, as you probably know there will be hundreds of people surrounding that pond. If you can try and pick up the Trout Formula BaitCloud product (at least 1-3pack)). Dropping a Bait Cloud in front of yo where the children will be fishing will definitely attract the rainbows to your area.
For bait you can use small garden worms on a hook with a split-shot sinker and float, or a roe-bag that you can purchase at Pete’s Tackle in St. Catharines. I would fish the bait about 6-8′ below the float.