towing travel trailer with full holding tanks?

I OFTEN wind up traveling with at least SOME of my waste tanks full and sometimes MOST of them full but when the waste tanks are full the FW tank is empty so not that MUCH of an increase in weight. There SHOULD be no issues with towing with full tanks but some smaller trailers design the tanks as ballast so if yours is one of those you COULD notice a difference in handling. Most larger trailers (15 feet and up) don't have this issue.
Good luck / Skip