@The_Dude
Go get some bulk head fittings. They are drains you would use on a rain barrel. Use 1 tub as a reservoir and the rest of the tubs as root bins. Use A BUNCH OF WATER. Don't skimp on this, 5 gallons is not enough, it gets hot too fast. It fluctuates in temperature too much, use 50 gallons. Move your drivers outside your tent, get some air flow, get some Styrofoam insulation boards and put them on top of your root bins. Most pond pumps like we use can be place outside the reservoir with a hose leading to the inlet.
I would suggest getting LPA down before you tackle HPA.