RV cover

ADCO recommends including the ladder but I'd always just measure the box itself at it's longest dimension and go with that. Covers, unless custom made for a specific trailer, are sized in ranges - i.e. 20' 1" to 22', 22' 1" to 24', etc, so chances are your's won't be at the extremes anyway. Obviously the covers are fabric and are quite generous so I personally wouldn't worry about the ladder, the spare tire & bracket I wouldn't cover anyway as I always dress the cover tight to the trailer's rear wall.