If you don't mind going a little further south...I'd recommend Lake Ann & Marion Lake. They are on the same trail. About a 40 minute hike to Lake Ann, which has NICE brookies. Marion is another 20 minutes uphill, and has nice 'bows (and maybe Brookies too). It's a 3 mile hike, but mostly uphill. But, it's worth it!
Hideaway Lake isn't hike in but there is never anyone there. Its about 10 miles down a jeep trail. Its way up on top the mountain above Timothy Lake. It has some nice brook trout but you will need a way to get out on the water no bank fish really. There are 3 lakes you can hike to from there also.
I am looking for a nice hike in lake for me and my son's to camp and fish for a few days. I have fished a few of the hike in lakes in Washington but I would really like to find a lake in Oregon for our next trip, preferably in the Mt Hood or Clackamas river area. Any ideas.