Water storage systems - drain and fill

Been admiring the many clever approaches some of you have come up with to drain & save the table water, then refill the tables on the XR’ and the pro’s. Wondering if anyone has tried a single 75 gallon storage tank out of an RV on their XR, as they are not cost prohibitive even when new.

75-gallon RV tank on my XR.

Old basketball hoop base on my Pro, holds about 23 gallons of water.