I have been traveling for years now all over the country with my FW tanks full every time I leave. The weight is low and the trailer is designed for it. I've never seen a warning in any trailer owners manual saying not to travel with them full.
Does anyone worry about filling their fuel tanks to full and falling out?
Anyone heard of someone losing their FW tank on the road somewhere? I never have. I don't think filling it half way is much better because the water will be sloshing side to side and back and forth exerting as much force as it would if full.
I'll also say if someone is noticing handling issues with the tank full maybe they could re-organize the trailers payload in order to adjust?
As for the gray water thing...I ain't touching that.
