Okay to travel with full tanks of water?

I have a lot of campers over the years, and other than a tent camper that didn't have tanks, I always "Use" them. We rarely camp where there are hook ups, and about half the time water, or dump stations aren't available. I've never had any issues, even though we often drive a considerable distance over rough dirt roads.

The above said, even with full fresh water tanks or waste tanks, I was never close to my weight limit. I never really worried about full fresh and waste tanks as I always basically just transfer the water from one tank to the other.