Since your chlorine dropped so low, I think you should shock your pool up to about 10. In your pool, every quart of 6% bleach will add a little under 1ppm of cl. So, I'd suggest adding about 2-1/2 gallons of bleach this evening. (Your volume is probably around 17,500 gallons.)

You'll need to test the water several times per day and each time, add enough bleach to get back to about 6. You don't want the chlorine to go lower than 3. Once you get some CYA in there, you'll be able to test and dose in the evenings only.

Go ahead and buy about 5 lbs. of stabilizer. Put it in an old sock and hang it in front of a return jet. Give it a squeeze once in awhile to help it dissolve faster. it will take a few days. Don't test the CYA level until at least a week after you add it so you don't waste your reagent. Any brand of stabilizer is fine as long as the ingredients are cyanuric or isocyanuric acid. If you can get it in there tomorrow, if you're lucky, it will have dissolved before you leave town.

Is your Dad going to test the water for you or only add bleach?