Bedtime routine for 2 little ones?

I'm going back to work in a week, and I'm wondering how you moms with 2+ very young kids do a bath/bedtime routine? My son is 15 months and my daughter is 9 weeks. The toddler currently gets dinner at 6:30ish, bath at 8 and is usually in bed asleep by 8:30-8:45. My 9 week old started sleeping through the night a week ago. Is it unrealistic to want to bathe both of them every night? I'll have to wake up the newborn at 5:30am and toddler at 6am at the latest to get to work on time, so I'd rather this whole routine not extend super late into the evening. What do you do?? Help!