How do you manage it if you are parenting alone?

DH works nights several times a week so that leaves me to put the girls down myself. Sometimes if LO2 woke up earlier than normal I can get her down at 7:30 and then put LO1 to bed at 8:00. That doesn't always happen though and I need them in bed around the same time, so I try and do both of their bedtimes at once which can be hard! LO1 will come in LO2's room and get her going wild and then when I ask LO1 to go wait in her room with a book while LO1 is being tucked in she gets mad. If I do books together it still takes time to get them wound down once they are actually in bed.