It's a nature of the beast, most of us learn to deal with it.
One thing that usually helps ours, when we're leaving a campground, make sure your hold tanks are empty, put about 10 gallons or so of fresh water in the tanks, then about a half bottle of Murphy's Oil
Soap, when you get to the next campground, dump the tank, and flush the black water tank for about 10 minutes or so.
This is not a permanent fix, but it should help.
Old age is coming at a really bad time!
1996 34' Excella 1000, interior totally redone, 2003 Dodge/Cummins HO, Diablo tuner, 115 gallon aux fuel, Bedslide, Airsafe/Reese Dual Cam, and a bunch of other stuff