I changed the mineral cart every season (as instructed).
You could leave it inline if you want to, if you don't mind the
small risk of green hair. The mineral levels would likely be pretty low for using it such a short time.
I assume you have a mineral cart and bac pac on hand already?-(if you don't it would
actually be cheaper to buy an inexpensive inline chlorinator to replace with the aqua smart unit than buying a mineral cart/bac pac combo-that stuff's expensive!....) Keep in mind the A.S. unit can't be used with the bac pac if the mineral cart isn't inside.
When I go on extended vacations each summer - (11,9,9 days respectfully the last three summers) I shock my pool, put on the solar cover, and leave my pump running 24/7 on low. I have come home each time to clear water and a FC residual above my "min".

Three years ago, when we were gone for 11 days, I had a friend come over and pour a small jug of bleach in for me on day 7.
So you can manage a week or so away, just by shocking and covering the pool to protect from evaporation/uv loss. Helps if you have someone check to make sure the equipment is running properly.
