Does the Hovercraft shape have more or less "glide" on untracked flats compared to a longer more traditional freeride/powder shape? I'm thinking in more of a resort or sidecountry setting... what I mean is: if I make a long traverse or even hike to get to a nice untouched line or bowl but then have a long flat runout to get back to a ski track or onto a groomed run will the Hovercraft sink at slow speeds or take me further than other boards? Having not ridden one, I can't figure out if the reduced surface area and lack of tail is a benefit or a drawback compared to something like the Flagship.
I would buy one and test myself, but the 160 is sold out according to the internets!
I've been using a 156 hovercraft split, and a 161 flagship this season, both mostly for in-resort off-piste. I can't say I've noticed much difference between the speed of the boards on the flats - both seem great. In Flaine there's some lovely off-piste runs similar to what you've described, and both of the boards seemed to out-glide pretty much everyone elses'.