That's so tough on everyone !!! Thank fully only one of mine had an issue with sleep from age 2-4 and then was fine again ! Sleep is soo important ! I would def use the gate and not engage any conversation or attention . I had a little one here disrupting nap time with short naps and one day I put her down earlier and for what ever the reason she napped longer ! So everyone else goes down around 1:00 and she goes down at 12:30 and sleeps until 2:30 and I just grab her and the rest sleep until 3