I haven't been for a while but I attended winter conference regularly when they first started. Tommie DePaola had lunch at my table, but most of the speakers stayed to their group. So it's not the best place for making personal connections with agents and editors. Of course, you can ask questions in sessions and sometimes after a session. Also, I made a couple of good writing friends. You never know who you'll meet. And NYC is the industry hub so you may see an agent or editor who isn't a speaker but is just supporting a friend and learning what they can.
Winter conference has intensives attached. I've never attended one, but I'd like to. There are also paid critiques if I'm recalling correctly.A
Another great option for conferences is Rutgers 1 on 1 Plus. You have to be accepted. You're paired with a mentor for one session of the day and sit with four other pairings for another. You can ask anything you like. Also, the speakers are available for lunchtime chats and pitching. They tell you where each one will be sitting. Look up RUCCL.org.