down-size the system to meet your immediate needs as well as makes it more mobile and easier to conceal and defend.
Use solar panels with deep cycle batteries to to run your pumps.
Use small wind turbine to either charge batteries at night or to directly pump air into the system.
For food....larvae, worms, old veggies and duckweed should supplement
for water....WSHTF...that will be a very expensive and sought after commodity....
Rain catchment and/or wells will have to supply drinking water and tank replenishment.
You would have to really minimize the evaporation from GB and FT.
Great thread to make you think....