It's pretty time consuming. Usually they row M-F 5-7am (you'd have to get up around 4am since they drive us over to Jack London) and also Saturdays 8-10am. The team does conditioning (lifting, erging, etc.) in the early evenings too.
Races are SUPER fun and everyone on the team is really nice. You can also give your coxswain a lot of s**t for anything that happens out in the water =P
Note: I used to be a coxswain for crew, but I had to quit since I would only get an hour of sleep every night...(finishing psets by 2-3am haha).