Well it's mixed at Bench Lake. The North Eastern shore does have some camping but none of it is what I could consider nice. The views from the lake are great but the sites are over used and can be trashed.
Although you do not get the iconic view of Arrow Peak the Western part of the lake has some very nice views looking back towards Cardinal Mountain. There is a decent place to camp in the corner that would likely get you further from any potential crowds.
Twice I have looked for the Ranger station without luck.
Also I have not seen any bear boxes there.
Western shore views: