I see a lot of units with them strapped on ladders but dont want that.(wife)
If the DW doesn't like the idea of the ladder because it would look tacky.....many make or buy covers for the wagon when hung on the ladder.
The ladder is really the best place to store it.
I have also seen some where they just painted it white with Krylon Spray paint and/or matching color to body paint on RV. To make it less offensive looking to carry on the ladder.
A waterproof weather pro cover for lawn mowers is easily adapted to cover it also.:C
https://www.weatherprocover.com/