There have been rumors about the weekend service for years, so no matter what you hear, it's speculative. If you need to get to NYC, DeCamp bus lines runs on the weekends. Not one's favorite choice, but I've used it for quite some time and they do get you there
Where do you need to get to? DeCamp has a web site so you can see the routes they run. I don't think the nearby trains/overnight parking thing is going to work for you -- most of those lots have long waiting lists and the closest in West Orange isn't probably going to make you jump for joy.