I guess the reason I am leaning towards a flatbed is because neither the Nomad or the Croozer cargo are advertised as completely waterproof.I am thinking a flatbed with a couple of Ortlieb waterproof bags attached would be more aerodynamic,keep things completely dry and allow me to use the trailer for other things around town.In all honesty if the Nomad had been advertised as completely waterproof I would have bought one and been done with it.For some reason keeping things dry is very important to me.