We call it cheating here too. I guess it's just another example of a case where "If something is too good to be true, it probably isn't true.
Sigh ... A top box for the Rocket is a good solution for adding storage. The way the Rocket is designed, it won't affect how you mount the bike, but as is always the case for top boxes, it will adversely affect high speed handling.
I guess that's why some folks add trailers or side cars.
When we want to travel together, my wife and I prefer the car. Quieter. Better audio. Easier to move around. Better climate control. Etc., etc., etc.
If I want to travel alone, I just pare down the junk that has to be brought along and add a soft bag in the place where the pillion would have ridden. Works for me. Very low cost.
YMMV