I have had 2 cs 18 months apart, after DS1 DH was back at work (he worked a few days while I was in hospital) and was then home for 5 work days, so by time he went back to work DS1 was 2 weeks old, but he had worked while i was in hospital for 6 days.

DS2 was very similar and I also had a toddler to care for as well as a newborn so was hard work but you just make it work.

Good luck, Its rather sucky that he has to go to Paris so soon afterwards at least furthest my DH went in first 6 weeks was sydney.