Without having someone you trust, best option is finding someone you don't.
All kidding aside...you might consider an automatic feeder, although fish can probably be ok for 11 days without being fed if you have a well established tank. (I would not let my fish go hungry for that long)
But bigger problem (assuming you have your lights all on automatic timer) is making sure you have enough excess water in sump to cover topoff water while you are gone.
I could not go that long...so I built a simple auto top-off system with a large container raised next to tank and a float switch to control it.
Something like this (different kinds)
Float Switch
Worked great, but I did not sleep well entire trip.
Good Luck!