Don't focus on just the big lake. Lake Wapato held fantastic trout when I brought my family over in June.

I don't know the big lake to well so I'll let other weigh in on that.

If you are looking to get the kiddos into some fish, you might have a better time and better action going up to Roses or Wapato lakes.

We went to Wapato lake, rented a rowboat, I rowed out 500 yards along the north shorline, and fished crawlers 3-6' under a float for some really nice Rainbows to 18-20", Crappie, Sunfish, and Perch. Caught a mess of fish in two hours.....One of the best family fishing days we ever had.

You could launch your big boat at the little resort on Wapato lake as well for a small fee.

Have fun!