3 day vacation. Looking for some suggestions

I am leaving for 3, nearly 4 days and was hoping someone could give me some suggestions on CL levels to leave my pool at.
Currently I'm at:
FC=12
CC=0
PH=7.6
CYA=45

The reason my CL level is so high is because I shocked my pool to raise it since I would be gone for a few days hoping that there would still be some in it when I get back. I seem to be losing approximately 2-2.5 ppm each day so I figured that somewhere between 12-15 should still give me approximately 3 when I get back (also trying to allow for some additional loss if my sneaky in-laws come by and swim, which very well could happen :) )

Does this sound right or are there any better suggestions?

Thanks!

Sounds about right--might go ahead and bump it up to the whole 15 ppm--won't hurt! If your pool stays covered, it will slow the chlorine loss. I think I would take advantage of those sneaky in-laws, and leave a jug of bleach out for them to pour into the pool when they're finished swimming! ;)

The absolute worst thing that would happen would be for the Cl to get too low and you have cloudy water when you come back, but that's dealt with easily enough. :)

Janet