To go on vacation, given your situation:

1. Insert your Aqua Smarte chlorine packs now -- don't wait for the chlorine to go down.
2. Lower the pH to 7.2 -- your high TA will cause it to rise slowly.
3. Purchase 15 gallons of plain 6% household bleach, and store it in a cool place accessible to your pool caretaker.
4. Run your pump on low for 1 day, to make sure everything works OK, then turn it to high, and leave it there till ready to go.
5. Before leaving, turn the pump to low, and the tablet feeder to a low setting.
6. Instruct your pool caretaker to add 1/2 gallon of bleach every EVENING -- NOT morning!
7. Instruct him/her to feel the pool surface under the water -- if it feels the slightest bit slimy, add a FULL GALLON more.

That's it.