LOL....A web cam so you can log on from a remote computer and look at the tank. A whole week....you are so brave. I am afraid to leave the house for more than 10 hours. It's so hard to pre-guess what might go wrong.
The top off I think was your biggest concern, and you have that covered. You could turn off the skimmer for a week, it won't hurt a thing to have it off. If it were to overskim it could affect the ATO. It's never a good idea to tweak a skimmer higher or lower just before leaving. Off is the best choice. Back in the day we only ran our skimmer twice a month, it eats all the coral food from the water.
I would cut the food down to half that I feed, the fish will be fine and it may protect the tank from an accidental overfeeding which can make things go bad fast. That way if Mom swings by and feeds the fish, and Sister comes an hour later not knowing mom was there...the worst they did was feed the fish an entire normal feeding.
