I have overnighted in Newark, NJ, connecting from the Cardinal to a next morning Regional to Boston.
I have overnighted in NY City, connecting from LSL 48 to a next morning Regional to RTE.
I have overnighted in CHI, connecting from the SWC to the next day Empire Builder.
However, these overnights, on my dime, were before the current AGR Insider came on the scene and the rules were different. What makes common sense to us doesn't apparently apply at AGR.
Good luck !