Get to Rockefeller from Linden NJ, which PATH?

Staying in Linden NJ on Wednesday night and wanting to take kids to see Rockefeller tree for first time. I've done a bit of research and it seems using the PATH is ideal, just not sure which is the easiest and would have the easiest parking? I don't do well with traffic and stress when I don't know where to go. Would love any advice!