I think they will be okay for 7 days. Try to find someone to take care of them if possible. I know our babies mean everything to us, but so do skin children.
I was away from Baby for 10 days on a cruise. Luckily, I had my uncle to take care of her, but I thought about her day and night! I still had a wonderful time, though. I checked in frequently, and she was doing fine.
Good luck!