Oh man, Alyssa! Erin here – I totally hear you!
I had a friend once with exactly this same problem, and she told her oldest that he could “camp out” in mom and dad’s room anytime he needed. Then, she put a sleeping bag next to their bed, and told her this was his camp-out space, and that he can sneak into their room when he needs to as long as he slips quietly into his sleeping bag. She added a glow-in-the-dark star so he could spot it when it was dark, and she said the whole thing worked like a charm! There was something about the physical boundary that cut down on the chit-chat entirely.
Hope you find a solution that works soon — and keep us posted! :)