Vacation advice! Leaving my tanks to my clueless room mate...

[lpsreefer]

So I leave for Mexico in two weeks. My room mate knows nothing really about aquariums. Do I write a problem /solution guide? With pictures.
The food is okay since I bought kind of a weekly pill box for each tank.
I also clearly labeled water levels.
This is the first time I'll be away for three weeks.
Any advice would be helpful.