When I had Kosmic, a 2011 AquaBay, to sell a few years back. The noise from the roof rack was the first thing I noticed when I was driving it home. You have to maintain those roof racks - the wood needs lacquering frequently. The more you pile up top, the more subject to crosswinds you will be and its knock-on effect on BraziBaysway.
Conversely, fitting a tow bar box will cause the rear of the camper to be heavy and raise the nose to a take-off attitude, thereby increasing BraziBaysway - so do what I do to counteract, put something heavy inbetween the front seats to force the nose down on the road.
#firstworldbrazibayproblems