the previous comment about 2Ls and 3Ls in wrong. They are doing their on-campus interviews now, and they will all be dressed in suits. Don't let it intimidate you; you'll see less of those suits after the first few weeks. Wear whatever you feel comfortable with for orientation and throughout the year.
3 piece suit, roller backpack, preferrably mode of transportation being a segway
Today was the first day of orientation. I walked in and there was a sea of black suits. They, of course, told us to dress professional. But, I was still relieved I wasn't the only one in a suit. The funny part is one guy apparently didn't get the memo, and he strolled in wearing a t-shirt, shorts, and flip flops. He looked like Jeff Spicoli. Everyone looked at him, and it was obvious they were making comments to each other. He just kind of shrunk away to the edge of the crowd. Can you imagine how he must of felt when he first walked in. I would have run home real quick to change. That's the antithesis to the one guy who shows up in a suit at an orientation with a casual dress code. They both looked like tools. Of course, maybe all of us in suits still looked like tools, but at least we could be tools together.