Did a water change before my trip tomorrow and will be out for 5 days. I made sure to have all the automation set for Extra light boost based on CO2 levels, AC on / off, humidifier / dehumidifier and also remote water change reservoir (with 3 gallons of RO water + 20ml of bottles 3 and 4).
Filled the grobo just like how @SWSVIC suggested (many thanks! ).
I also changed how I top off her water, see my feed chart for example (the goal is to minimize the drift which is considered the ppm sweet spot, I got this recommendation from a pro grower friend. He also inspected her and recommended for me to start from week 3 feeding schedule):
This is how she looks before I take off for 5 days (I wanted to clean up the bottom more but I think I should give her a few more days to recover from all the recent cropping before doing so).
She is 27" tall now, I only have 5" left of vertical space.