GFS, if you do not intend to haul a toad along with yer scoot, I would choose the inclosed trailer, look at it as a portable garage. Keep that RK nice and shiney. Also it's a good place to store it while on the road and in the CG, avoid those prying eyes.
If ya need to also take a car along with you check out BLUE OX, they have a very nice Bike and Toad system. As a matter of fact I may buy one myself. Good Luck !