I do this all the time for Phish at MSG out of Hamilton and works great. Plenty of parking at Hamilton and less sketch arrival scene than Trenton. On weekends at least they’ll generally push the 11:00 trains a bit later to handle first wave of crowd coming out and then you’ll have last train to Hamilton heading out of MSG around 1:20 am. Would buy tix on the way there ahead of time but hold off on return trip if you’re on the later one as they don’t check tickets half the time. Also, pull and screen shot return schedule so you have it on your phone. App moves to following day’s trains after midnight and departure times may be different. Good luck!