My wife and I went up to Golden Trout lakes last June. Hiking poles are am must.
It's a tough hike, but really worth it. There was still some snow, and there's a part where you have to climb over some pretty big rocks (I'm no rock climber, I'm talking about carefully clearing some pretty big boulders. We even had to take the backpacks off a few times).
The meadow just below the first lake is really amazing, and the lake itself is even better (we didn't go up to the second one).
Here are some pictures: http://triofilm.com/inyonf2010jun/
In a few days, we're going from Onion Valley over Kearsage Pass to Charlotte lake, then down to Road's End. I just talked to the rangers today on the phone, they said the snow is basically gone and no winter equipment (crampons and such) are needed.
We've been up towards Ranger Lakes (not all the way) from Lodgepole two years ago, that's beautiful too, you'll love it. Also try Eagle Lake from Mineral King, that's amazing.
Have fun on your tip, see you on the trail!