I've seen some truck camper set ups that had self built water tanks between the bed of the truck and floor of the camper. Have also seen some that had tanks mounted under the truck bed next to the frame. Might be worth considering so you can keep your COG down as low as possible.I had that much in water bricks up there last season. But worth checking some specs I suppose. I’m not married to the design or placement. Mainly just want it out of the way and easy to access with fill ups. That’s why everybody’s input is valuable. Keep it comin!