I've been up Tom Creek a couple of times, solo, trying to get to Dragon Lake. It's pretty nasty after the first bit like Ned said, but doable. I'd stick to the left side of the creek (facing upstream) and you might find remnants of the old trail. There were a few old tattered pieces of flagging still up when I was last there a few years ago. Stick uphill away from the creek a little when you hit the canyons. After that it mellows out a bit again till you get closer to the headwaters.
It's a lot of work, unless you like bushwhacking I'd approach from Olympus. It is really beautiful and unspoiled in the Tom Creek valley though. I ran into two bull elk and a herd of 19 cows over 2 days in there.
