For night 1, first thing you want to do is go to tails' cove camera, here you can see if mario is at your door or not.if he is gone from that camera, CLOSE THE LEFT DOOR, wait until he leaves and occasionally check dining area (possibly tails' cove, since in one of my playthroughs Mario appeared in tails' cove when he left the door) to see if he is gone. Same thing with yoshi except you have to pull down the monitor and check the right door light, check tails' cove, pull down your monitor after you check it for 2-3 seconds or less, and immediately check the door light and pull up your monitor, repeat, this can ensure you win with power to spare

Night 2 is the same except Mario and Yoshi are faster and tails is on the move, if you see tails move in his cove, check the right door light and THEN proceed to use your light. You will beat the night with this strategy hopefully

Sorry if I didn't explain some things correctly I'm not good at creating and explaining strategies to people