Your journey with your grand children's would have been nice , even it seems that your grand children's have enjoyed their days. I always love to do fishing at loon lake and it's a decent place for fishing rainbows 8 - 14 inches.
I have fished in Loon Lake. We trolled small wooly buggers, spratleys and leech patterns around the lake and did well although I would have rather cast to rising fish. It's a nice place for fishing.